Shipping Supplies Guide

Boxes, mailers, tape, labels, bubble wrap, scales — everything you need to ship packages at volume. Types, sizing, pricing tips, and bulk-buy recommendations.

Boxes

Shipping Boxes

The right box is cheap insurance against damage claims and re-ships. Pick by weight class, fragility, and standard carrier sizing. Below: standard box types, when to use each, and specific dimensions that keep you under dimensional weight surcharges.

Types of Shipping Boxes

TypeWhat it isBest for
Single-wall corrugatedStandard corrugated cardboard, most common for ecommerce.Packages under 15 lbs with non-fragile contents
Double-wall corrugatedTwo layers of corrugated for heavy or long-distance shipments.Packages 20+ lbs or heavy-duty use
Triple-wall corrugatedIndustrial-strength for heavy/oversized shipments.50+ lb items, furniture, fragile heavy goods
Regular Slotted Container (RSC)The standard 'brown box' design with four flaps top and bottom.General ecommerce
Full Overlap Container (FOL)Flaps fully overlap for extra rigidity.Heavier items that flex regular RSC
Die-cut mailer boxesPre-cut flat boxes that fold into shape without tape on the exterior.Small DTC brands that want premium unboxing without cost

Sizing reference

Standard ecommerce box sizes: 4×4×4, 6×4×4, 6×6×6, 8×6×4, 9×6×4, 9×9×4, 10×8×6, 12×9×4, 12×12×6, 14×10×6, 16×12×6. Match close to your product dimensions.

Practical tips

  • Standard sizes (6×4×4, 9×6×4, 12×9×4, etc.) are cheaper than custom sizes
  • Bulk-buy in 100+ quantities — saves 40-60% per box over singles
  • Home Depot / Lowe's sell single boxes at 3-5x online bulk prices — use for emergencies only
  • Uline and ULINE have the deepest bulk catalog but not always cheapest
  • Amazon Business, eBay, and Alibaba offer competitive bulk pricing
  • Match box to contents tightly — oversized boxes risk dimensional weight penalties

Frequently asked questions

Where's the cheapest place to buy shipping boxes?
Bulk orders from Uline, Amazon Business, Alibaba, or eBay (often 40-60% cheaper than retail). For low volume, The UPS Store or big-box hardware stores work but cost 3-5x more per box.
Single-wall or double-wall?
Single-wall is fine for most under-15-lb packages with non-fragile contents. Double-wall is for 20+ lbs, long-distance, or fragile items.
Can I reuse shipping boxes?
Yes, as long as the box is structurally sound — no tears, compressed corners, or excessive tape residue. Remove old labels completely (or black them out) to avoid carrier confusion.
What size box do most ecommerce sellers use?
The most common is 9×6×4 inches — fits small apparel, accessories, books, and accommodates USPS Flat Rate Small box pricing if needed.

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Custom Boxes

Custom-branded boxes transform ecommerce unboxing from forgettable to memorable. At scale, they're marketing investment that drives repeat purchase and social media sharing. Minimum orders and setup costs are meaningful — understand the economics before committing.

Types of Custom Boxes

TypeWhat it isBest for
Exterior printed mailer boxesBrand colors and logo printed on the outside of the box.DTC brands prioritizing visibility in transit
Interior printed boxesPlain exterior, custom interior pattern/message.Surprise unboxing experiences
Die-cut custom mailersCustom-shaped boxes for specific product dimensions.Exact product sizing, premium products
Rigid custom boxesHeavy-duty boxes for luxury goods.Watches, high-end electronics, gifts

Practical tips

  • Minimum orders typically 500-1,000 units for custom printing
  • Setup costs: $100-500 for plate/printing setup (amortizes across the order)
  • Per-box cost: $2-5 for simple printing, $5-10 for die-cut or multi-color
  • Packlane, Noissue, Fantastapack, PackageKing offer accessible custom box services
  • Sustainability: printing on recycled corrugated is cheaper than you'd think
  • Lead time: 2-6 weeks typical for printed boxes — plan ahead

Frequently asked questions

How much do custom boxes cost?
$2-10 per unit depending on size, print complexity, and quantity. Plus $100-500 in one-time setup costs (plates, printing setup).
What's the minimum order for custom boxes?
500-1,000 units for most suppliers. Some smaller services (Packlane) go as low as 100 units but cost-per-unit is much higher.
How long does custom box production take?
2-6 weeks from artwork approval to delivery. Rush orders 1-2 weeks at 30-50% premium.
Are custom boxes worth it?
For brands with 100+ orders/month and identity-focused marketing, yes. For small sellers doing 5-20 orders/month, generic boxes with branded stickers often better economics.
When do custom boxes actually make financial sense?
When stock-box waste, dim-weight, or branding pays for the setup cost. If your product forces you into an oversized stock box (paying to ship air) or you're buying void fill to pad a bad fit, a right-sized custom box can pay back the tooling in dim-weight savings alone. Below a few hundred units of a stable-size product, stock boxes plus good void fill usually win.
What's the minimum order for custom boxes?
It varies wildly — digital/short-run printers do quantities in the low hundreds at higher per-unit cost, while traditional die-cut runs want thousands to amortize the cutting die. Get quotes at your real volume before assuming custom is out of reach; short-run printing has made small custom orders far more accessible than the old thousands-minimum era.
Do printed boxes increase theft or damage risk?
Branded boxes can advertise contents (an electronics logo is a target), so high-value goods sometimes ship better in plain outers with branding inside as the unboxing reveal. Structurally, custom boxes are as strong as their board grade — spec the flute and wall to the weight, same as any box; printing doesn't weaken corrugated.
How far ahead do I need to order?
Build in lead time: custom runs take from about a week for short-run digital to several weeks for die-cut-and-print at volume, plus shipping the boxes to you. Reorder before you're down to your last few hundred — running out of your only box size stops fulfillment cold in a way stock boxes never do.

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Mailers

Poly Mailers

Poly mailers are plastic shipping bags — cheaper, lighter, and easier to store than cardboard boxes. Ideal for non-fragile, soft goods like apparel and accessories. They save 30-50% vs equivalent boxes in both material cost and dimensional weight pricing.

Types of Poly Mailers

TypeWhat it isBest for
Standard poly mailersBasic opaque plastic bags with adhesive closure.Clothing, soft goods, most ecommerce apparel
Bubble-lined poly mailersPoly exterior with bubble wrap lining for shock absorption.Lightweight electronics, jewelry, books
Tear-proof poly mailersHeavier-gauge plastic designed to resist tearing.Heavier soft goods, multi-item packs
Compostable mailersPlant-based plastic that decomposes.Sustainable brands and eco-conscious DTC
Printed/branded mailersCustom-printed mailers with your brand.Brands that want a visual unboxing moment

Sizing reference

Size to about 2 inches larger than your folded/flattened item. 9×12 fits a folded t-shirt; 10×13 fits a hoodie; 14.5×19 fits a jacket.

Practical tips

  • 2.5 mil thickness is standard for most ecommerce. 3+ mil for heavy or multi-item shipments
  • Sizes commonly: 6×9, 9×12, 10×13, 12×15.5, 14.5×19, 19×24
  • Avoid poly mailers for fragile items — they provide zero protection against drops
  • Peel-and-seal closure is standard — tape sometimes doesn't stick well to plastic
  • Bulk orders from Amazon Business, Uline, or PackagingBrahma offer best per-unit pricing

Frequently asked questions

Are poly mailers cheaper than boxes?
Yes — typically 30-50% cheaper per unit, plus they're lighter (reducing DIM weight costs).
Can I ship fragile items in poly mailers?
Not recommended. Use bubble-lined poly mailers for lightweight fragile items, but boxes are safer for heavy or breakable goods.
What thickness should I use?
2.5 mil is the standard for most ecommerce. 3+ mil for heavier or multi-item shipments. Below 2 mil is flimsy.
Can I ship clothes in a poly mailer?
Yes — ideal use case. Fold the garment neatly, seal in the mailer, add a polybag inside if you want extra moisture protection.
When is a poly mailer the wrong choice?
Anything rigid, fragile, or crushable. Poly mailers are unpadded plastic envelopes — perfect for soft, non-breakable goods (apparel, textiles, plush) but zero protection for anything a stack of packages could crush. Books survive; ceramics don't. If the item has a shape to protect, it needs a box or a padded mailer, not a poly.
What mil thickness do I need?
2-2.5 mil handles most apparel and soft goods; 3-4 mil for heavier or sharper-edged contents that could split a thin bag. Thicker resists tearing and punctures but costs more — match to the weight and edge-sharpness of what's inside. A heavy pair of jeans in a 2-mil bag is a split waiting to happen.
Do poly mailers protect against rain?
The bag itself is water-resistant, but the seams and the self-seal strip aren't waterproof — driving rain on a porch can wick in. For moisture-sensitive soft goods (some textiles, paper goods), bag the item inside the mailer or use a box. Poly resists incidental moisture well; it's not a dry-bag.
Are poly mailers recyclable or sustainable?
Standard poly mailers are store-drop-off film recycling, not curbside — same stream as bubble wrap. Recycled-content and compostable poly-alternative mailers exist and are increasingly popular for apparel brands. If sustainability matters to your buyers, the mailer choice is visible and worth making deliberately.

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Padded Mailers

Padded mailers are the middle ground between a plain poly mailer and a full corrugated box. They add protective cushioning for items that would rattle and break in a poly mailer but don't need the full rigidity of a box. The right padded mailer saves you money on packaging and postage while keeping fragile-ish items intact.

Types of Padded Mailers

TypeWhat it isBest for
Bubble-lined poly mailersPlastic exterior with bubble wrap lining — lightweight, moisture-resistant, and flexible.Lightweight jewelry, phone cases, small electronics accessories, cosmetics samples
Bubble-lined kraft mailersPaper exterior with bubble wrap lining — more premium look, recyclable exterior.Brands that want paper-look packaging; items going to eco-conscious buyers
Self-seal padded mailersPeel-and-seal closure — no tape required.High-volume fulfillment where sealing speed matters
Rigid padded mailersCardboard backing with padded interior — resists bending.Photos, documents, gift cards, flat items that cannot bend

Sizing reference

Common sizes: #000 (4×8 in), #0 (6×10 in), #1 (7.25×12 in), #2 (8.5×12 in), #4 (9.5×14.5 in), #5 (10.5×16 in). The # system corresponds to interior dimensions. Choose a size that fits your item snugly — excess space means item movement and potential damage.

Practical tips

  • Padded mailers are NOT a substitute for a box with fragile items — if it can shatter, it needs a box
  • Bubble-lined poly mailers offer some moisture resistance; kraft-lined do not — use poly for outdoor drop boxes
  • Don't oversize your mailer — a small item rattling in a large padded mailer is worse than a snug fit
  • Buy in cases of 100–200 for meaningful cost savings vs single-unit pricing
  • Padded mailers can go through standard USPS letter carrier delivery without a truck — reducing delivery failure rates

Frequently asked questions

Can I ship books in padded mailers?
Paperbacks in good condition can ship in bubble-lined kraft padded mailers. Hardcovers or fragile/valuable books should go in rigid mailers or corrugated boxes — padded mailers don't prevent corner compression damage.
Are padded mailers waterproof?
Bubble-lined poly mailers are water-resistant (not fully waterproof). Kraft-lined mailers are not water-resistant. For items sensitive to moisture, place inside a sealed polybag before putting in the mailer.
What's the difference between a padded mailer and a poly mailer?
Poly mailers have no padding — they're just a plastic sleeve. Padded mailers have a layer of bubble wrap or paper cushioning inside the exterior material. Use padded for items that could crack, chip, or dent with rough handling.

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Labels

Thermal Labels

Thermal labels are the gold standard for shipping labels — no ink, fast printing, waterproof. But not all thermal labels are equal. Direct thermal vs thermal transfer, roll vs fanfold, and brand-specific sizing all matter.

Types of Thermal Labels

TypeWhat it isBest for
Direct thermal labelsHeat-sensitive coating — no ink or ribbon needed.Shipping labels (standard)
Thermal transfer labelsRequires ribbon, more durable than direct thermal.Industrial or long-life labels (not needed for shipping)
4×6 roll labelsStandard shipping label format on rolls.Most thermal printers (Rollo, Zebra, MUNBYN)
4×6 fanfold labelsStack of labels folded back-and-forth instead of rolled.Some industrial printers
DYMO-specific labelsProprietary sizing for DYMO LabelWriter printers.DYMO 4XL shipping labels

Sizing reference

Standard shipping: 4×6 inches (102mm × 152mm). USPS, UPS, FedEx, DHL all accept this. Smaller sizes (2.25×1.25) for return addresses only.

Practical tips

  • Standard 4×6 = 102mm × 152mm. Match to your printer's spec
  • Buy 500-1,000 count rolls for best per-label pricing ($0.03-0.06 per label)
  • Amazon Brand-Approved thermal labels are typically cheapest bulk option
  • DYMO printers require DYMO-brand labels at 2-3x the cost — budget accordingly
  • Zebra printers accept generic 4×6 labels from many brands
  • Check roll core size before ordering — desktop label printers use 1-inch cores; industrial Zebra printers use 3-inch cores

Frequently asked questions

Direct thermal or thermal transfer?
Direct thermal for shipping labels. Thermal transfer is for industrial applications needing long-life labels. Direct thermal is cheaper and sufficient for 30-90 day shipping labels.
Do DYMO labels work with Rollo?
No. DYMO labels have proprietary sizing and won't feed correctly in non-DYMO printers. Buy Rollo-compatible 4×6 labels (plenty of cheap options).
How many labels in a typical roll?
500 labels per roll is standard. 1,000-count rolls are cheapest per-unit but require printer with larger roll capacity.
Are thermal labels waterproof?
Yes. Direct thermal labels resist water, smudging, and scuffs — part of why they're preferred for shipping over inkjet labels.

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Label Printer Rolls & Thermal Paper

Thermal label printers are the standard for shipping labels in any volume ecommerce operation. They're faster, cheaper per label, and more reliable than inkjet. But choosing the right label roll — correct dimensions, compatible core size, direct thermal vs thermal transfer — determines whether labels scan cleanly and adhere properly.

Types of Label Printer Rolls & Thermal Paper

TypeWhat it isBest for
4×6 inch direct thermal rollsThe universal shipping label format for all major carriers. No ink or ribbon required.All standard carrier shipping labels: USPS, UPS, FedEx, DHL — works with Rollo, Zebra ZP450, ZD420, DYMO 4XL
2×7 inch address labelsNarrow format for address-only labels and return labels.Return address labels, product labels, supplemental address labels
Fanfold (continuous perforated sheets)Z-fold label stack rather than a roll — used in high-volume commercial printers.Industrial label printers in fulfillment centers; reduces roll changes
Thermal transfer labelsRequires a wax or resin ribbon in addition to the label media — more durable, scratch/chemical resistant.Labels that need durability over time: product labels, warehouse bin labels

Sizing reference

Core size matters: most desktop label printers use 1-inch cores. Industrial Zebra printers use 3-inch cores. Check your printer's spec before buying. Roll diameter maximum also varies — the Rollo X1040 accepts up to 5-inch OD rolls; desktop DYMO accepts only smaller rolls.

Practical tips

  • Buy generic/third-party 4×6 thermal rolls — they're compatible with Rollo, Zebra, and DYMO at 50–70% less cost than branded rolls
  • Direct thermal labels fade over time and with heat — store in a cool, dark environment and don't leave in direct sunlight
  • Test scan readability before committing to a new label brand — some off-brand thermal papers have density issues that cause scan failures
  • 500-roll labels (500 labels per roll) are the standard for medium volume; 250-roll labels for smaller operations
  • Keep 2–3 spare rolls on hand — running out mid-batch is a common fulfillment disruption

Frequently asked questions

What thermal label rolls work with Rollo printers?
Rollo printers use 4×6 inch direct thermal labels with a 1-inch core. Third-party rolls work fine — search for '4x6 thermal labels 1-inch core' and choose any reputable brand. Rollo's own branded rolls are more expensive without meaningful quality advantage.
Do I need thermal transfer or direct thermal labels for shipping?
Direct thermal is the right choice for shipping labels. Thermal transfer labels are for durable product labels that need to withstand abrasion or chemicals. Direct thermal shipping labels are cheaper (no ribbon required) and perfectly adequate for the transit duration of a shipment.
How many shipping labels are on a standard roll?
A standard 4×6 inch label roll holds 250–500 labels depending on the manufacturer. High-capacity rolls hold up to 1,000. Fanfold stacks for industrial printers come in 1,000–4,000 label counts.

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Tape & tools

Packing Tape

The wrong tape causes boxes to burst in transit — one of the most avoidable shipping disasters. Use purpose-made packing tape (not masking, duct, or cheap clear tape) and apply it correctly to keep boxes closed through carrier handling.

Types of Packing Tape

TypeWhat it isBest for
Clear polypropylene tapeStandard clear tape, good for most ecommerce.General shipping, light-to-moderate weight
Brown Kraft tapePaper-based tape activated by water — eco-friendly.Sustainable brands, heavy boxes
Reinforced paper tapePaper tape with fiberglass threads for extra strength.Heavy shipments, oversized boxes
Filament tape (strapping)Strong tape with embedded fibers running lengthwise.Securing large or heavy packages
Dispenser tapeTape designed for automatic dispensers.High-volume packing stations

Practical tips

  • 2-inch width is standard — provides enough surface for a proper seal
  • H-taping method: seal the center seam + both end seams. Tape them together to form an H across the top
  • Don't use masking, duct, or electrical tape — they don't hold under shipping stress
  • Kraft paper tape is now recyclable with the box, unlike plastic tape
  • Buy 6-12 rolls at a time for meaningful bulk savings

Frequently asked questions

Can I use duct tape for shipping?
No. Duct tape adhesive fails under shipping stress and isn't rated for packaging. Use clear packing tape, kraft tape, or reinforced paper tape.
What width packing tape is best?
2-inch is standard and provides good surface area. 3-inch for heavy-duty boxes. Avoid 1-inch — insufficient sealing.
Clear tape vs Kraft tape?
Functionally equivalent for most uses. Clear tape is cheaper. Kraft tape is eco-friendly and recyclable with the box.
Why do my boxes keep popping open?
Either insufficient tape (too few strips), wrong tape type (masking/duct), or a box too full for its size. Use H-tape method with quality packing tape on properly sized boxes.
What tape actually holds a box in transit?
Pressure-sensitive packing tape (acrylic or hot-melt), 2 inches wide, 1.8+ mil — applied with the H-taping method (both center seams plus the two end edges). Skimp on width or use the wrong tape and boxes pop in the network. What doesn't work: masking tape, duct tape (its adhesive fails cold), and cellophane office tape.
Acrylic vs hot-melt tape — does it matter?
Yes, in the cold and over time. Hot-melt (the shinier, stronger-initial-grab tape) holds heavy boxes well but can degrade in heat or over long storage; acrylic is cheaper, weathers temperature swings better, and is quieter off the roll. For cold-chain or long-transit shipments, acrylic's temperature tolerance is the safer default.
Do I really need water-activated tape?
Only at volume or for security. Water-activated (gummed paper) tape bonds into the corrugated fiber for a tamper-evident, very strong seal — favored by high-volume and high-value shippers. For everyday shipping, quality pressure-sensitive tape applied properly is plenty; gummed tape's benefit is security and single-strip strength, not everyday necessity.
Why does my tape not stick to the box?
Usually dust, cold, or recycled-box surface. Tape needs a clean, dry, room-temperature surface to bond; cold boxes, dusty warehouse stock, and the coated surface of some recycled board all fight adhesion. Wipe the seam, let cold boxes warm up, and press the tape down firmly — adhesion needs pressure to activate.

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Tape Guns & Box Cutters

Tape guns and box cutters don't get much attention, but they're used hundreds of times a day in busy fulfillment operations. A good tape gun applies tape in the right width and tension with minimal hand fatigue. A good box cutter opens boxes quickly and safely. Cheap tools in high-volume operations cause RSI and slow throughput.

Types of Tape Guns & Box Cutters

TypeWhat it isBest for
Handheld tape dispensers (2-inch)Standard handheld tape gun accepting 2-inch wide tape rolls — the ecommerce standard.General box sealing; accepts standard 2-inch packing tape rolls
Handheld tape dispensers (3-inch)Wider tape guns for heavy-duty sealing — fewer passes needed per box.Heavy boxes, high-security sealing, large corrugated boxes
Snap-blade utility knives (retractable)Knives where the blade snaps off in sections to maintain sharpness — most common in fulfillment.Box opening, cutting tape, scoring corrugated
Safety box cuttersBlades retract automatically or are recessed to prevent injury — important in high-volume settings.Fulfillment centers with pickers and packers; reduces cut injuries

Practical tips

  • Apply tape in an H-pattern on both top and bottom of boxes: one strip along the seam, plus one perpendicular strip on each end — this provides 3x the seam strength vs a single strip
  • Replace blade segments regularly — a dull box cutter requires more force and causes more injuries than a sharp one
  • Ergonomic tape guns with soft-grip handles matter for high-volume operations — wrist and hand fatigue are real at 200+ boxes/day
  • Use 2.8–3 mil tape for standard ecommerce shipping; 3.5–4 mil for heavy boxes — don't cheap out on tape thickness for heavy packages
  • Dispense tape from a tape gun rather than a roll by hand — it applies consistent tension and saves time

Frequently asked questions

What tape gun do most ecommerce businesses use?
The Scotch Box Sealing Tape Dispenser (ST-181) or Uline H-150 are the most common in ecommerce. Both accept standard 2-inch tape rolls, cost $10–20, and are durable enough for commercial use. Avoid plastic tape guns under $5 — they break under daily commercial use.
How much tape should I use to seal a shipping box?
Minimum: one strip down the center seam top and bottom, plus H-reinforcement (short strips perpendicular at each end). For boxes over 20 lbs or carrying fragile/high-value contents, tape all flap edges as well.
What's the safest box cutter for a fulfillment team?
Self-retracting safety knives (brands: Martor, Pacific Handy Cutter) are the safest — the blade retracts the instant you release pressure. They cost $15–30 each but significantly reduce cut incidents in high-volume settings.

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Shipping Scales

Accurate package weighing prevents postage refund claims, DIM weight surprises, and incorrect USPS/UPS/FedEx charges. A $30-80 digital postal scale pays for itself quickly by eliminating overpaid postage on guessed weights.

Types of Shipping Scales

TypeWhat it isBest for
Basic digital postal scale (up to 50 lbs)Standard small scale for most ecommerce.1-50 lb packages, under $50
Heavy-duty scale (up to 150 lbs)Larger platform and capacity for freight-sized packages.Larger packages, wholesale, heavy items
Postal scale with LCD remoteScale separate from display for large-package weighing.Oversized packages where you can't see the small display
USPS-certified scaleCalibrated to USPS standards.High-volume USPS shippers who ship at post office

Practical tips

  • Digital > mechanical — digital is more accurate and easier to read
  • Choose capacity 20% above your heaviest typical package (weight buffer)
  • Look for 0.1 oz resolution for accuracy; 0.01 oz for very small items
  • Hold/Zero button is essential — makes weighing easier
  • Plug-in powered > battery (batteries die during high-volume sessions)
  • Popular brands: Saga, Accuteck, Rubbermaid, FitSales

Frequently asked questions

What capacity shipping scale do I need?
For most ecommerce: 50 lb capacity. For heavy/oversized: 150-330 lb. Choose 20% above your heaviest typical package for accuracy buffer.
Are kitchen scales accurate enough?
Kitchen scales max out at 10-15 lbs and aren't designed for shipping. Postal scales have proper capacity and accuracy for packages.
How accurate does my scale need to be?
USPS requires accuracy to 0.1 oz for small packages. For 1+ lb packages, 0.1 lb accuracy is fine. Most $30-50 scales meet these standards.
Can I use my bathroom scale?
For weighing bigger items or checking your package + yourself (then subtracting), yes — but bathroom scales are less accurate than postal scales and can't zero properly.
Do I really need a shipping scale?
If you ship more than occasionally, yes — it pays for itself fast. Guessed weights cost money two ways: under-declaring triggers carrier adjustment fees weeks later, and over-declaring overpays on every label. A cheap digital scale that reads to the ounce eliminates both, and the carriers reconcile declared weight against their own scales regardless of your guess.
What capacity and precision should the scale have?
For parcels, a scale reading to 0.1 oz up to about 50 lb covers most e-commerce; heavier shippers want a 100+ lb platform. Precision matters most under a pound, where USPS ounce bands mean a fraction of an ounce crosses a price tier. If you sell light goods, prioritize fine resolution over huge capacity.
Postal scale vs kitchen scale — is there a difference?
A kitchen scale works for light parcels if it reads high enough and to the ounce, but dedicated shipping scales add useful features: hold function (for oversized items that block the display), higher capacity, and tare for packaging. For serious volume the shipping scale's ergonomics matter; for a few light packages a week, a decent kitchen scale genuinely suffices.
Should I weigh before or after packing?
After — always weigh the finished package. Carriers bill the shipped weight including box, void fill, tape, and label, and that can be a pound or more over the naked item. Weighing the packed parcel is the only number that matches what you'll actually be charged for.

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Stretch Film

Stretch film (commonly 'pallet wrap') is used to secure multiple boxes together on a pallet for freight shipping. High-volume sellers, B2B shippers, and wholesale suppliers rely on it to bundle orders. Not relevant for individual ecommerce packages — this is for freight-scale shipping.

Types of Stretch Film

TypeWhat it isBest for
Hand stretch filmRolls designed for manual wrapping.Small pallet volume (5-20 pallets/week)
Machine stretch filmIndustrial film for automated pallet wrappers.High-volume operations
Pre-stretched filmPre-stretched before sale — easier to apply.Consistent application without full stretch force
Colored stretch filmColor-coded for routing or destination.Warehouses organizing by destination

Practical tips

  • 70-gauge is standard for hand wrapping. 80+ gauge for heavy loads
  • Multiple layers on corners — that's where loads fail
  • Start at the bottom, spiral up, finish at the top — standard pattern
  • Pre-stretched film saves 30-40% in material cost at high volume
  • Machines pay off around 50+ pallets per week

Frequently asked questions

Do I need stretch film for ecommerce?
Only if you ship at pallet scale (50+ boxes at once). For individual package shipping, stretch film isn't needed.
Hand vs machine stretch film?
Hand for under 20 pallets/week. Machine for 50+/week. Machine saves labor time but requires $500-3,000 equipment investment.
How many wraps per pallet?
3-5 layers for most loads. More for heavy or fragile. Corner wraps 2x base layers.
Where do I buy stretch film?
Uline, Grainger, Amazon Business. Bulk cases (4-6 rolls) are most cost-effective.
How is stretch film different from shrink wrap?
They're opposites people confuse constantly. Stretch film is applied under tension and holds by its own elastic memory — no heat, wrapped around a pallet or bundle. Shrink wrap is applied loose then heated (heat gun or tunnel) to shrink tight around a single product. For securing freight loads you want stretch film; for retail packaging of one item you want shrink wrap.
What gauge do I actually need?
Gauge is film thickness. 70-gauge hand film handles typical light-to-medium pallets; 80-90 gauge for heavy or sharp-cornered loads; machine film runs its own thickness spec. Going thicker than the load needs just wastes money and tires your wrapping arm — match gauge to load weight and corner sharpness, not to a 'thicker is safer' instinct.
Why do my wrapped pallets keep failing in transit?
Almost always corners and base. Loads shift at the corners and topple when the top isn't tied to the base — so reinforce corners with extra passes and always start by wrapping the bottom layer to the pallet itself. A load that isn't anchored to its pallet is a load waiting to lean.
Is stretch film recyclable?
LLDPE stretch film is technically recyclable but not through most curbside programs — it's a store-drop-off plastic film like grocery bags, or a commercial recycling stream for high-volume operations. Warehouses generating rolls of it weekly should set up film recycling rather than landfilling; it's a clean, single-resin plastic that recyclers want.

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Strapping & Banding Supplies

Strapping (also called banding) secures large boxes, bundles, and pallet loads against the forces of freight transit. A poorly secured pallet load becomes a carrier damage liability and a warehouse safety hazard. The right strapping material depends on load weight, transit method, and whether it's a one-way or reusable application.

Types of Strapping & Banding Supplies

TypeWhat it isBest for
Polypropylene (PP) strappingLightweight plastic strapping — the most common for light-to-medium loads.Carton bundling, light pallets under 1,000 lbs, box reinforcement
Polyester (PET) strappingStronger than PP, maintains tension over time and through temperature changes.Heavier pallets 1,000–3,000 lbs, outdoor storage loads, long-distance freight
Steel bandingMetal strap — highest breaking strength, doesn't stretch.Very heavy loads (3,000+ lbs), metal/lumber bundles, rail and sea freight
Cord strapping / composite strapPolyester cord-reinforced strap — flexible and absorbs impact shock better than rigid strapping.Vibration-sensitive freight, fragile loads that need tension without rigidity

Practical tips

  • PP strapping is for securing cartons; PET or steel is for pallet loads going through freight handling — match the material to the force it needs to resist
  • For hand tensioning, use a strapping tensioner tool — under-tensioned strapping is nearly useless and over-tensioned strapping crushes boxes
  • Seal strapping with friction-weld sealers (PP) or metal buckles (polyester/steel) — never just tie it
  • Apply at minimum 2 straps around a pallet: one near each end; add a third in the middle for tall loads
  • Combine strapping with stretch wrap for maximum pallet stability — strapping alone without stretch wrap still allows individual boxes to shift

Frequently asked questions

What strapping do I need for a standard shipping pallet?
For standard 40×48 pallets with 1,500 lbs or less, 3/4-inch polypropylene strapping with 2–3 horizontal bands is standard. For heavier loads or outdoor storage, use 1/2-inch or 3/4-inch PET strapping.
Do I need a machine to apply strapping?
Not for low volume. Manual strapping tools (tensioner + crimper, around $30–80) handle PP and light PET strapping. Semi-automatic and automatic strapping machines make sense at 50+ pallets/day.
Is strapping required for LTL freight?
LTL carriers don't mandate strapping but recommend it. Unstabilized pallet loads frequently arrive damaged because they tip or shift during transit. Strapping combined with stretch wrap is standard practice for any LTL shipment.

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Cushioning & fill

Bubble Wrap

Bubble wrap is the most common protective fill for shipping. Not all bubble wrap is equal — bubble size, thickness, and whether it's anti-static or perforated all affect protection and cost.

Types of Bubble Wrap

TypeWhat it isBest for
Small bubble (3/16-inch)Small bubbles tightly packed. Good general cushioning.Small items, moderate protection
Medium bubble (5/16-inch)Standard ecommerce bubble size.Most general shipping needs
Large bubble (1/2-inch)Larger, more air-filled bubbles.Fragile items needing serious cushioning
Anti-static bubbleTreated to prevent static discharge.Electronics, sensitive components
Bubble pouchesPre-made bubble bags with sealed edges.Quick packing without taping
Bubble mailersBubble wrap integrated into mailer bags.Books, small electronics, single-item shipments

Practical tips

  • Wrap fragile items with 2-3 layers — one layer isn't enough for drops
  • Bubble-side touching the product is the conventional method
  • Perforated bubble rolls tear off evenly — worth the small extra cost
  • Don't seal bubble wrap tight around items — cushioning works better with slight give
  • Bulk 700-ft rolls from Uline or Amazon Business are significantly cheaper per foot than retail

Frequently asked questions

Which bubble size is best?
Medium (5/16-inch) is the standard for ecommerce. Small bubbles for ultra-delicate small items. Large bubbles for fragile heavy items.
How many layers of bubble wrap do I need?
Minimum 2 layers for fragile items. 3+ for very fragile (glass, ceramics, electronics). Wrap tightly enough that the item doesn't shift, loose enough to compress on impact.
Bubble wrap vs packing peanuts?
Bubble wrap for protection around the item. Peanuts for void fill in the remaining box space. Best practice: use both.
Where can I buy bubble wrap cheap?
Bulk rolls from Uline, Amazon Business, PackagingBrahma, or Costco. Small-quantity retail is 3-5x more expensive per foot.
What bubble size should I use?
Small bubble (about 3/16 inch) for surface protection and wrapping small items; large bubble (1/2 inch and up) for cushioning heavier items and filling larger voids with shock absorption. Many packing stations keep both — small to wrap, large to cushion. Matching bubble size to the job beats over-wrapping everything in one size.
Which side of the bubble wrap faces the item?
Bubbles facing in, toward the item — the flat side out. This protects the bubbles from popping against the box wall and puts the cushioning air directly against what you're protecting. It's the single most common bubble-wrap mistake and it measurably reduces protection when done backwards.
Is bubble wrap recyclable?
It's a store-drop-off plastic film, like grocery bags — not curbside in most areas. Clean, deflated bubble wrap goes in the same film-recycling stream. For eco-conscious brands, recyclable paper cushioning or biodegradable alternatives increasingly replace it; if you use bubble, tell buyers it's drop-off recyclable.
Can I reuse bubble wrap I received?
Absolutely — intact bubble wrap protects just as well the second time, and reuse is the greenest option. The only caveat is popped bubbles provide no cushioning, so check that the bubbles still hold air before trusting reused wrap on anything fragile.

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Foam Wrap & Foam Sheets

Foam wrap provides surface protection and cushioning without the dust and static of packing peanuts. For fragile items — ceramics, electronics, glassware — foam wrap is often the best combination of protection, cleanliness, and professional presentation. The challenge is choosing the right foam type for the item.

Types of Foam Wrap & Foam Sheets

TypeWhat it isBest for
Polyethylene (PE) foam wrapClosed-cell foam in sheets or rolls — lightweight, moisture-resistant, non-abrasive.Glassware, ceramics, kitchenware, general fragile items
Anti-static foamPink or charcoal-colored foam that dissipates static charge.Circuit boards, RAM, CPUs, any electronics sensitive to electrostatic discharge
Foam pouchesPre-formed foam sleeves that items slide into — faster than wrapping.High-volume packing of consistently sized items (glasses, bottles, small electronics)
Foam-in-place / polyurethane foamTwo-part expanding foam that conforms to item shape inside the box.Oddly shaped, high-value items where custom-fit protection is worth the cost

Sizing reference

Foam sheet thickness ranges from 1/16 in (light surface protection) to 1/2 in (heavy cushioning). For most ecommerce fragile items, 1/8 in or 1/4 in sheet foam is sufficient. Use thicker foam (3/8–1/2 in) for heavier items that could compress thinner foam to ineffectiveness.

Practical tips

  • Foam wrap alone doesn't provide cushioning against drops — pair with a correctly sized box that allows 1–2 inches of cushioning on all sides
  • Closed-cell PE foam is moisture-resistant; open-cell foam absorbs liquid — use closed-cell for anything that might encounter damp conditions
  • Anti-static foam is not optional for circuit boards — standard foam can build and discharge static charge, destroying components
  • Foam pouches for glassware (wine glasses, lab equipment) dramatically speed up packing for high-volume operations
  • Foam roll cuts cleanly with scissors or a box cutter — pre-cut rolls to common lengths for your item sizes to speed up packing

Frequently asked questions

Can I use foam wrap instead of bubble wrap?
For surface protection, yes — foam wrap is often better (non-abrasive, cleaner). For shock absorption during drops, bubble wrap and foam wrap have similar properties in thin sheets. For heavy or high-value fragile items, foam wrap in 1/4 in+ thickness with a correctly sized box is excellent.
What foam do I need for shipping electronics?
Anti-static foam for any bare circuit boards, RAM sticks, CPUs, or similar components. Regular PE foam for assembled devices in their enclosures (phones, tablets, laptops) — the assembly already isolates sensitive components from static.
Where is foam wrap cheapest?
Uline and Sealed Air (Bubble Wrap brand) are the main bulk suppliers. For small quantities, Amazon Business is competitive. Buying in roll form (250–500 ft) is significantly cheaper per square foot than pre-cut sheets.

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Packing Peanuts

Packing peanuts fill the empty space in a box after you've wrapped the item. They prevent shifting during transit. Traditional polystyrene peanuts are cheap but environmentally problematic — alternatives are better for eco-focused brands.

Types of Packing Peanuts

TypeWhat it isBest for
Traditional (EPS foam) peanutsCheap polystyrene foam, non-biodegradable.Cost-sensitive bulk shipping
Biodegradable starch peanutsCorn or potato starch, dissolves in water.Sustainable brands
Air pillowsInflatable plastic cushions.Void fill without particulate mess
Kraft paper fillCrumpled kraft paper for void fill.Curbside-recyclable cushioning
Tissue paperFine paper for light cushioning.Premium unboxing experiences

Practical tips

  • Starch peanuts work great but dissolve in humidity — not for wet destinations
  • Air pillows are the most cost-effective at high volume (less material per cubic inch)
  • Kraft paper is fully recyclable and works for most lightweight goods
  • Peanuts create static cling on some products — use anti-static if shipping electronics
  • For eco-conscious brands, paper or starch > polystyrene

Frequently asked questions

Are packing peanuts recyclable?
Traditional (EPS) peanuts: rarely recyclable in curbside programs. Starch peanuts: dissolve in water (compostable). Paper fill: curbside recyclable.
Peanuts vs air pillows — which is better?
Air pillows are more cost-effective at high volume and create less mess. Peanuts conform better to oddly-shaped items. Use depending on item shape.
Can I ship electronics with peanuts?
Use anti-static peanuts for sensitive electronics. Regular peanuts can create static discharge that damages components.
Are starch peanuts worth the premium?
For eco-focused brands, yes. They're 2-3x the cost of EPS peanuts but biodegrade. For cost-sensitive bulk shipping, EPS remains cheapest.
Biodegradable vs polystyrene peanuts — which should I use?
Starch-based biodegradable peanuts dissolve in water and compost, which customers appreciate and which avoids the static-cling mess — but they're pricier and can slump under heavy weight or in humidity. Traditional EPS (polystyrene) peanuts are cheap, light, and moisture-proof but are a disposal headache buyers dislike. For most sellers the reputational win of biodegradable outweighs the cost on lighter items.
Do packing peanuts actually protect fragile items well?
Only if used correctly. Peanuts let items migrate to the box wall unless the item is suspended in the center with peanuts fully surrounding it — 'float' the item, don't just pour peanuts on top. For genuinely fragile goods, double-boxing or foam is more reliable; peanuts shine for irregularly-shaped, moderately-durable items.
Where can I get rid of packing peanuts I received?
Many pack-and-ship stores (including UPS Store locations) accept clean peanuts for reuse — a genuinely circular option. Starch peanuts dissolve under a tap or go in compost. Point customers to reuse/dissolve options in your packing insert; it turns a disposal annoyance into a small goodwill moment.
Why do peanuts cling to everything?
Static. EPS peanuts build static charge from friction, which is the source of the clinging mess. Anti-static peanuts exist for electronics (regular peanuts can hold a charge that damages sensitive components — never use standard EPS around bare electronics). Starch peanuts don't static-cling at all, another point in their favor.

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Kraft Paper

Kraft paper is the brown paper used to wrap items and fill boxes. It's cheap, renewable, fully recyclable, and works as both primary wrap and void fill. Increasingly popular as a sustainable alternative to bubble wrap and plastic.

Types of Kraft Paper

TypeWhat it isBest for
Kraft roll (flat)Rolls of brown kraft paper, standard thicknesses from 30-50 lb.Wrapping items and void fill
Kraft void-fill paperPre-crumpled or machine-crumpled for loose fill.Quick box filling
Recycled kraftMade from recycled content, typically darker brown.Eco-focused brands
Kraft mailer insertsPre-cut paper designed to cushion specific item types.Standardized DTC shipments

Practical tips

  • 30 lb weight is standard for wrapping; 50 lb for heavy-duty
  • Crumple kraft to create void fill — the crumples absorb impact like peanuts
  • Amazon Basics and Uline have the best bulk kraft pricing
  • Kraft is curbside-recyclable with regular paper — big sustainability win
  • Mix kraft with reinforced paper tape for 100% recyclable shipments

Frequently asked questions

Is kraft paper as protective as bubble wrap?
Not quite — bubble wrap absorbs more impact. But kraft is sufficient for non-fragile items and significantly better for the environment.
Can I recycle kraft paper?
Yes — kraft paper is fully curbside-recyclable with regular paper recycling programs.
Where can I buy kraft paper in bulk?
Uline, Amazon Business, and Paper Mart offer bulk kraft rolls. 30 lb weight in 1,000+ ft rolls is most cost-effective.
Kraft vs tissue paper?
Kraft is tougher and suitable for shipping. Tissue is thinner and decorative — use both for premium unboxing with kraft as the protective layer and tissue as the presentation wrap.
Kraft paper vs bubble wrap for void fill — which is better?
Depends on the goods. Crumpled kraft paper is recyclable, curbside-friendly, and great for void fill and wrapping non-fragile items; bubble wrap cushions shock better for fragile goods but is a plastic-film disposal problem. Many sellers use kraft for void fill and reserve bubble for the fragile item itself — best of both.
What weight (basis weight) of kraft paper should I buy?
Lighter (30-50 lb) for wrapping and light void fill; heavier (60-70 lb) for reinforcement, wrapping heavier items, or when you want the paper to hold a crumple. Rolls sold for shipping usually indicate the use; if you're buying one weight, a mid-range basis weight covers the most tasks.
Is kraft paper strong enough to ship without a box?
For flat, durable, non-fragile items sometimes — heavy kraft or a padded kraft mailer can survive the network for books, apparel, and similar. But loose kraft paper is a wrap-and-void material, not a shipping container; it needs a box or mailer around it for anything the carrier will toss, stack, and conveyor.
Recycled vs virgin kraft — does it matter?
For most shipping uses, no functional difference — recycled kraft is standard and marketing-positive. Virgin kraft is marginally stronger and cleaner-looking for premium unboxing. If sustainability is part of your brand, recycled kraft is the obvious pick and buyers notice the choice.

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Packing Paper & Newsprint

Packing paper is the most versatile and recyclable void fill option. It works as cushioning, wrapping material, and surface protection — all from one product. Unprinted newsprint (the blank version of newspaper) is the industry standard; printed newspaper works but transfers ink to items.

Types of Packing Paper & Newsprint

TypeWhat it isBest for
Unprinted newsprintLightweight, clean paper in sheets or rolls — the standard packing paper for most ecommerce.Void fill, wrapping non-fragile items, surface protection inside boxes
Kraft wrapping paperHeavier brown paper with more strength than newsprint — resists tearing during wrapping.Wrapping heavier or sharper items, outer wrapping for boxes, multi-layer cushioning
Honeycomb kraft paperDie-cut kraft paper that expands into a hexagonal cushioning structure.Eco-conscious brands replacing bubble wrap; good cushioning with no plastic
Tissue paperLightweight decorative paper — more presentation than protection.Wrapping clothing, gifts, and retail items where appearance matters

Practical tips

  • Crumpling packing paper creates more air pockets and better cushioning than flat sheets — always crumple before using as void fill
  • For fragile items, wrap the item itself in 2–3 sheets of packing paper before placing in the box, then add crumpled paper void fill
  • Packing paper is cheaper per pound of void fill than packing peanuts and more recyclable
  • Honeycomb paper machines (like Ranpak) can produce void fill on demand but require an equipment investment — better for high-volume operations
  • For sensitive items (printed merchandise, photographs), unprinted newsprint is essential — printed newspaper transfers ink to everything it contacts

Frequently asked questions

How much packing paper do I need per box?
A rough guide: 2–3 sheets for wrapping a standard item, plus 4–6 sheets crumpled for void fill in a standard 12×9×4 box. Buy in reams of 500 sheets or rolls of 300–600 ft depending on your volume.
Is packing paper or bubble wrap better for fragile items?
For moderate fragility (ceramics, kitchen goods), crumpled packing paper in a correctly sized box provides excellent protection and is more eco-friendly. For highly fragile items (glassware, electronics), bubble wrap or foam wrap provides better shock absorption per inch of thickness.
Can I use printed newspaper as packing paper?
Yes for protection purposes, but the ink transfers to items. Avoid with anything light-colored, printed, or porous. Unprinted newsprint is cheap enough that the ink transfer risk isn't worth it.

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Paper Void Fill & Honeycomb Wrap

Paper void fill is the dominant trend in sustainable ecommerce packaging. It's 100% recyclable, performs comparably to bubble wrap for moderate cushioning needs, and reads as premium to eco-conscious buyers. The tradeoff is cost and speed — paper void fill systems are typically more expensive per cubic foot than packing peanuts but cheaper in total cost when you factor in customer perception.

Types of Paper Void Fill & Honeycomb Wrap

TypeWhat it isBest for
Hand-torn paper (kraft roll)Simple kraft paper rolls torn into sheets and crumpled by hand — the lowest-cost paper void fill option.Low-volume packing operations where machine investment isn't justified
Paper dispensing machines (Ranpak, Pregis)Machine-converts kraft paper rolls into fanfolded, crumpled cushioning on demand.Mid-to-high volume fulfillment — reduces packing time and standardizes cushioning quality
Honeycomb kraft wrapDie-cut kraft paper that unfolds into a hexagonal cellular structure — wraps items like bubble wrap.Wrapping individual items that need surface protection with an eco-aesthetic
Shredded kraft paperPre-shredded kraft strips used like packing peanuts.Void fill and presentation fill in retail/gift packaging

Practical tips

  • Paper void fill compresses more than bubble wrap under heavy items — use thicker layers for heavier products
  • Paper machines (Ranpak GP series, Pregis AutoPad) pay for themselves at roughly 30–50 boxes/day through reduced packing time — the exact break-even depends on your labor cost
  • Honeycomb wrap is more expensive per square foot than bubble wrap but eliminates plastic — factor brand value into the cost comparison
  • Shredded paper (not shredded documents — purpose-made kraft shred) looks more premium in gift boxes than packing peanuts
  • For fragile items, paper void fill alone may not provide enough cushioning — pair with foam wrap around the item itself

Frequently asked questions

Is paper void fill as protective as bubble wrap?
For moderate cushioning needs (non-fragile to moderately fragile items), crumpled paper void fill is comparable to bubble wrap. For highly fragile items (glassware, electronics), foam wrap provides better shock absorption than either.
Are paper void fill machines worth the investment?
At 30+ boxes/day, a basic paper machine (Ranpak GP, around $1,500–3,000) typically pays for itself within a few months through labor savings. Below that volume, hand-torn kraft paper is more economical.
What is honeycomb wrap and how do I use it?
Honeycomb wrap is kraft paper with die-cut hexagonal perforations. When you pull the ends, it expands into a cellular cushioning material. Wrap around items the same way you'd use bubble wrap — it holds shape and provides surface and moderate impact protection.

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Cold-chain & moisture

Gel Ice Packs & Refrigerants

Shipping perishable products — food, live cultures, certain cosmetics, pet food — requires understanding how long your insulation system can hold temperature, not just adding ice packs and hoping for the best. The gel pack is only part of the system; the insulated liner, box size, transit time, and ambient temperature all determine whether products arrive in safe condition.

Types of Gel Ice Packs & Refrigerants

TypeWhat it isBest for
Standard gel packs (16 oz / 1 lb)The most common size — holds 34°F for approximately 12–18 hours in a standard insulated box.Single-meal kits, small perishable orders with 1-day transit
Large gel packs (32–72 oz)Longer hold time — 24–48 hours in well-insulated boxes.2-day perishable shipments, meal kits, raw pet food
Dry iceSolid CO2 — subzero temperatures for frozen shipments. Sublimates (disappears) in transit.Frozen products, ice cream, meat, items requiring 0°F or below
Phase change materials (PCMs)Engineered materials that maintain specific temperatures (2–8°C, 15°C, etc.) as they melt/freeze.Pharmaceutical products, probiotics, temperature-controlled medical supplies

Practical tips

  • Freeze gel packs solid for 24+ hours before use — partially frozen packs hold temperature for half the time
  • Rule of thumb: 1 lb of gel pack per 1 lb of product for 1-day transit; 2 lbs of gel pack per 1 lb of product for 2-day
  • The insulated liner matters as much as the gel pack — thin foil liners lose temperature 2–3x faster than expanded polystyrene (EPS) foam liners
  • Ship Monday–Wednesday for perishables to avoid weekends in carrier facilities with no temperature control
  • Dry ice requires carrier notification (hazmat class 9) and specific package markings — don't ship dry ice without carrier approval

Frequently asked questions

How long do standard 16 oz gel packs stay cold?
A frozen 16 oz gel pack in a foil-lined box stays below 40°F for approximately 12–18 hours at 70°F ambient. In an EPS foam box, 18–24 hours. Add more packs and thicker insulation for longer transit times.
Can I ship dry ice with USPS?
USPS prohibits dry ice in all mailpieces. Dry ice must be shipped via UPS or FedEx with proper hazmat labeling (Class 9 UN1845 markings — the older ORM-D marking has been retired) and carrier notification.
What's the difference between gel packs and phase change materials?
Gel packs maintain cooling passively as they thaw. Phase change materials are engineered to hold a specific target temperature (e.g., exactly 2–8°C) for longer durations with better consistency — they're used for pharmaceutical cold chain shipments where temperature precision matters.

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Moisture Barrier Bags & Desiccants

Moisture damage is an underappreciated shipping risk — electronics, food, printed goods, and leather products can all be damaged by humidity during transit. A sealed corrugated box doesn't protect against humidity; moisture permeates cardboard readily. For humidity-sensitive products, moisture barrier bags and desiccants are the solution.

Types of Moisture Barrier Bags & Desiccants

TypeWhat it isBest for
Foil moisture barrier bags (MBB)Multi-layer foil-laminate bags with heat-seal closure — the strongest moisture barrier available for packaging.Electronic components, PCBs, food products, moisture-sensitive pharmaceuticals
Vacuum seal bagsPolyethylene/nylon bags with airtight zipper or heat seal — removes air along with moisture.Clothing storage shipments, food, leather goods, anything needing both moisture and oxygen exclusion
Silica gel desiccant packetsSilica gel absorbs moisture from inside a sealed package — does not require a foil bag to work.Shoes, leather goods, electronics in standard bags, any sealed package with humidity risk
Molecular sieve desiccantsMore aggressive moisture absorption than silica gel — maintains lower relative humidity.Pharmaceutical components, precision optical equipment, sensitive electronics

Practical tips

  • Desiccants extend the time a sealed package stays dry but don't work forever — size desiccant quantity to the transit time and bag volume
  • Standard silica gel unit: 1 gram of silica gel per 1 cubic foot of bag volume for standard transit (under 7 days)
  • Moisture barrier bags must be heat-sealed or properly ziplock-sealed — an open top defeats the purpose entirely
  • For electronics shipped internationally (longer transit, varied humidity climates), use both MBB and silica gel desiccant together
  • Include humidity indicators (color-change cards) in high-value sensitive shipments so receivers can confirm moisture exposure during transit

Frequently asked questions

Do I need moisture barrier bags for shipping electronics?
For consumer electronics in finished products (phones, cameras), standard packaging is typically sufficient for domestic transit. For bare circuit boards, PCBs, and sensitive components, moisture barrier bags with desiccants are strongly recommended — moisture can cause corrosion and ESD issues.
How do desiccant packets work?
Silica gel desiccants absorb water vapor from the air inside a sealed package. They don't produce anything — they just capture moisture molecules. When saturated, they stop working. Size them for the expected transit duration — don't assume one small packet protects a large sealed bag for a month.
Can I reuse silica gel desiccant packets?
Yes — silica gel can be regenerated by heating in an oven at 250°F for 1–2 hours. The color-indicating type (blue/pink) makes it easy to see when they're saturated and need regeneration.

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