To ship a backpack, empty every pocket, tighten and tuck the straps, then pack it in a poly mailer if it’s soft and has no frame, or in a snug corrugated box if it has a frame or valuable contents. Ship it by USPS Ground Advantage for most light backpacks, or compare UPS Ground for heavier, larger packs.
The size of the package matters more than the backpack’s weight. A 2-pound daypack in an oversized box can be billed as if it weighed 15 pounds. The steps below cover preparing the pack, choosing a mailer or box, picking a service and avoiding items that aren’t allowed in the mail.
How Do You Prepare a Backpack for Shipping?
- Empty every pocket. Check hip-belt pockets, lid pockets and hydration sleeves. Forgotten items can shift, tear fabric or turn out to be restricted.
- Remove anything hazardous. Take out fuel canisters, bear spray, lighters, aerosol sunscreen and power banks. These are hazardous materials with their own shipping rules, and many can’t go in the mail at all.
- Drain and dry the hydration reservoir. Pack a bladder empty and fully dry so it doesn’t leak or grow mildew in transit.
- Tighten and tuck the straps. Cinch the shoulder straps, hip belt and compression straps, then tuck or tape the loose ends against the pack so they can’t snag on sorting machines.
- Protect hardware. Wrap buckles, aluminum frame stays and zipper pulls in a layer of bubble wrap or paper.
- Clean a used pack. Brush off dirt and let the pack dry fully. Soil and seeds can cause problems with customs on international shipments.
Should You Ship a Backpack in a Box or a Poly Mailer?
It depends on how structured the backpack is. A soft school bag, a packable daypack or a drawstring bag ships well in a padded or heavy-duty poly mailer. Anything with a frame, a rigid back panel, a laptop sleeve with electronics, or a high value belongs in a box.
| Backpack type | Best packaging | Why |
|---|---|---|
| Packable or drawstring bag | Poly mailer | Light, folds flat, nothing rigid to protect |
| School or everyday daypack | Heavy-duty poly mailer or small box | Mailer keeps the package small; box if new with tags |
| Laptop or tech backpack | Box with padding | Rigid panels and any electronics need protection |
| Internal- or external-frame hiking pack | Box sized to the frame | Frame stays and hip belts bend under pressure |
| Designer or collectible bag | Double box | Protects shape, leather and hardware from crushing |
To box a backpack, stuff the main compartment with crumpled paper so it keeps its shape, wrap it in a plastic bag against moisture, and leave about 2 inches of cushioning on each side. Choose the smallest box that fits. The same packing approach works for jackets and other soft goods in our guide on how to ship clothes.
Which Shipping Service Is Best for a Backpack?
For most backpacks under a few pounds, USPS Ground Advantage is the first service to price. It replaced First-Class Package Service in July 2023 and now covers packages up to 70 pounds. Priority Mail is faster, and UPS Ground is worth comparing for heavier packs and boxes going long distances.
| Service | Delivery commitment | Weight / size limit | Best for |
|---|---|---|---|
| USPS Ground Advantage | 2–5 business days | 70 lbs, 130 in. length + girth | Light backpacks in mailers or small boxes |
| USPS Priority Mail | 2–3 business days (expected) | 70 lbs, 108 in. length + girth | Faster delivery; free Priority Mail boxes |
| UPS Ground | 1–5 business days | 150 lbs, 165 in. length + girth | Heavier packs, multiple bags, long distances |
Both USPS services include up to $100 of insurance on most shipments. For a closer look at the two USPS options, read our comparison of USPS Priority Mail vs Ground Advantage.
How Do Size and Weight Affect the Cost of Shipping a Backpack?
Carriers charge for the larger of a package’s actual weight and its dimensional weight. USPS applies dimensional weight to boxes over 1 cubic foot (1,728 cubic inches), using length × width × height ÷ 139. UPS uses the same 139 divisor on its daily rates for packages of any size.
Here’s what that means for a 2-pound daypack:
- In an 18 × 14 × 8 inch box (2,016 cubic inches), the dimensional weight is about 15 pounds.
- In a 12 × 10 × 6 inch box (720 cubic inches), it’s under 1 cubic foot, so USPS prices it on its actual weight. UPS bills it at about 6 pounds.
- In a flat poly mailer, the package stays small, which usually keeps the price closest to the real weight.
Compressing the pack and choosing a smaller box is the single biggest saving. Before you buy a label, compare live USPS and UPS rates for your package in the ParcelPath rate calculator. ParcelPath is free to use, with no subscription or per-label fee, and offers up to 89% off USPS and up to 85% off UPS retail rates.
You don’t need a printer, either. Take the package to a Post Office with a USPS Label Broker code, or to a UPS Store with a UPS Mobile Barcode, and the clerk prints the label. If you’re new to shipping, our guide on how to ship a package walks through each step.
What Can’t You Pack in a Backpack You’re Shipping?
A backpack packed for the trail often holds items that are hazardous materials in the mail. USPS’s shipping restrictions cover flammable and pressurized items, and carriers check for them. Remove these before you ship:
- Camp stove fuel canisters and liquid fuel bottles, even if they seem empty.
- Bear spray and other aerosols, which are pressurized and often flammable.
- Lighters and matches.
- Power banks and loose lithium batteries, which have separate mailing rules.
- Hand sanitizer, which USPS treats as a flammable hazardous material.
If you’re sending the backpack as part of a move or a trip, our guide on how to ship luggage covers shipping bags ahead of travel.
How Do You Ship a Backpack Internationally?
Pack it the same way, then complete a customs declaration that describes the item clearly, such as “used nylon hiking backpack, personal use,” with a realistic value. The destination country may charge duties or taxes based on the declared value.
Check the USPS International Mail Manual country listing or UPS’s country rules first. Hazardous items that are restricted domestically, such as fuel, aerosols and hand sanitizer, are prohibited in international mail, so double-check every pocket.
Frequently Asked Questions
Can you ship a backpack in a poly mailer?
Yes, if the backpack is soft and has no frame, rigid panels or fragile contents. Fold it flat, tuck the straps, and use a heavy-duty or padded poly mailer. A small, flat package usually keeps the price close to the real weight. Frame packs, laptop bags and valuable or designer backpacks should go in a padded box.
What is the cheapest USPS service for a backpack?
USPS Ground Advantage is usually the lowest-priced USPS service for a light backpack. It replaced First-Class Package Service in July 2023, delivers in 2 to 5 business days, accepts packages up to 70 pounds and includes up to $100 of insurance on most shipments. Compare it with UPS Ground for heavier packs.
How do you keep backpack straps from getting damaged in shipping?
Tighten every shoulder strap, hip belt and compression strap to its shortest setting. Then tuck the loose ends behind the pack or tape them flat. Wrap buckles and zipper pulls in bubble wrap or paper so they can’t snag on sorting equipment or crack against the box.
Can you ship a backpack with a hydration bladder inside?
Yes, as long as the reservoir is completely empty and dry. Drain it, let it air-dry fully, then pack it in its sleeve or in a separate plastic bag. A bladder with water left in it can leak through the pack and the box, and a damp one can grow mildew in transit.
Sources
- USPS Ground Advantage
- USPS Priority Mail
- USPS Shipping Restrictions
- USPS Label Broker
- UPS: Shipping Dimensions and Weight
Part of our How to Ship Sports Equipment guide. Related: How to Ship a Treadmill, How to Ship a Kayak, How to Ship a Bow.
