The full step-by-step process for hand-washing a hiking backpack safely, what to use, what to avoid, and how often a pack actually needs a wash.
By Marcus Hale, Lead Pack Research Editor · Published September 14, 2026, 6:03 PM ET · Updated September 29, 2026, 6:16 PM ET
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In plain English
Washing a hiking backpack is closer to washing a good raincoat than a pair of jeans. The fabric has a thin waterproof coating on the inside and a water-shedding finish on the outside. Rough treatment wears both away.
So the method is gentle. Empty every pocket and shake out the crumbs. Use a tub or big sink with lukewarm water and a small amount of mild soap. Clean the dirtiest parts, the straps and back panel that soak up sweat, with a soft brush. Rinse until no suds are left, then hang the pack somewhere airy and shady to dry.
Before you start, check the tag or the maker's website. Some brands are happy for you to soak the whole pack; others say not to, especially on packs with wheels. The maker's own advice comes first, because it knows the materials it used.
Washing a hiking backpack correctly takes cool water, mild soap, a soft brush, and some patience, followed by a full air-dry that can take a day or more. Skipping any step — using hot water, scrubbing with a stiff brush, or drying near a heat source — shortens the life of the pack's coatings, foam, and stitching faster than trail use alone.
What you'll need to wash a hiking backpack
A full wash needs five things: a bathtub or basin large enough to submerge the pack, cool or lukewarm water, a mild soap or technical wash, a soft-bristle brush, and a well-ventilated space to dry it afterward. Nothing on this list is specialized gear-store equipment.
Pack makers such as Deuter recommend lukewarm water with a pH-neutral soap, and Gregory advises against detergents and solvents, so a technical wash such as Nikwax Tech Wash or Granger's Performance Wash is the safer choice: normal laundry detergents leave a residue that can interfere with DWR coatings. A dedicated gear brush or a clean, worn toothbrush reaches into seams, webbing loops, and hardware without abrading the coated fabric the way a stiff scrub brush can. Avoid all-purpose household cleaners, bleach, and fabric softener — none are formulated for coated nylon or ripstop fabric, and all three can strip waterproofing or weaken stitching thread over repeated washes.
Step-by-step wash process
The process runs in a fixed order: prep, submerge, scrub, rinse, and dry. Each step protects the pack's hardware and coatings from the step before it, so working out of order risks damage a careful wash avoids.
Empty and prep — remove everything from every pocket, turn interior pockets inside out, and take out any removable frame stays or foam inserts per the care label.
Close hardware — zip every zipper and buckle every clip so agitation or scrubbing doesn't catch on open teeth or loose webbing.
Submerge and soak — fill a tub with cool water and a small amount of mild soap, then submerge the pack briefly to loosen ground-in dirt.
Scrub targeted areas — focus a soft brush on the hip belt, shoulder straps, and back panel, where sweat salts and body oils concentrate most heavily.
Rinse thoroughly — drain the soapy water, refill with clean water, and agitate gently until no suds appear; repeat if the pack was heavily soiled.
Press, don't wring — squeeze excess water out by hand or press the pack between towels, since wringing can distort seams, foam, and frame channels.
Air-dry fully — hang the pack inside out in a shaded, ventilated spot until it is completely dry, which can take a day or more, before repacking or storing it.
What to avoid when washing a pack
The most common washing mistakes are hot water, a top-loading machine's center agitator, stiff scrub brushes, and heat-drying. Each one attacks a different part of the pack — coatings, hardware, fabric, or foam — in ways that don't show up until the damage is already done.
Hot water accelerates the breakdown of PU (polyurethane) coatings on a pack's interior lining, causing them to flake or turn tacky over time. A top-loading washing machine's center agitator catches straps, mesh pockets, and buckles, stretching or tearing fabric that a hand wash's controlled scrubbing never touches that aggressively. Stiff-bristle brushes and abrasive sponges wear through DWR and PU coatings faster than dirt does on its own, leaving the fabric underneath exposed to moisture. Bleach and fabric softener both strip waterproof coatings and can weaken or discolor stitching thread, sometimes permanently.
How often should you wash a hiking backpack
A pack used for weekend day hikes typically needs a full wash once or twice a season; a pack used for multi-day or thru-hiking trips, where sweat and dirt build up over consecutive days, benefits from washing after every extended trip. Spot-cleaning sweat-heavy areas — the hip belt padding and shoulder strap lining — between full washes keeps odor from building up without the full soak-and-dry cycle every time.
Washing more often than needed isn't harmful as long as cool water and mild soap are used each time, but every wash strips some DWR finish from the outer fabric. A pack washed several times a season likely needs occasional reproofing to keep water beading on the surface rather than soaking in. Packs stored clean and dry between trips generally need fewer washes overall than packs put away damp or dirty, since trapped moisture and sweat salts are what drive both odor and coating breakdown between uses.
Frequently Asked Questions
Regular laundry detergent can leave a residue that interferes with DWR water-repellent coatings and irritates skin against the hip belt and straps. A technical wash like Nikwax Tech Wash or a mild pH-neutral soap is the safer choice: Nikwax notes that normal laundry detergents leave a residue on outdoor fabrics, and Gregory advises against detergents.
Removable aluminum or composite frame stays should come out before submerging the pack, both to protect them from bending and to let water reach the frame sheet and back panel fully. Check the pack's care label or owner's manual for how the stays release on that specific model.
A fully soaked pack can take a day or more to air-dry completely, longer for thickly padded hip belts and back panels. Hanging it inside out in a shaded, ventilated spot and stuffing it loosely with a dry towel speeds the process without adding heat.
Some guides say a small amount of dish soap works fine for most packs. Pack makers are more cautious. Deuter recommends lukewarm water with a pH-neutral soap or shower gel.2 Osprey suggests mild, soapy warm water with a sponge or soft brush and no harsh chemicals,6 and REI suggests about 6 inches of lukewarm water in a tub with a mild, fragrance-free soap.1 Gregory advises against detergents or solvents and warns that heavy brushing can damage fabric coatings.3
Nikwax explains the concern: normal laundry detergents leave a water-attracting residue on outdoor fabrics.5 Many dish soaps are detergents too, so if you use one, use very little and rinse thoroughly. A gentle soap or a product labeled as a technical wash is the lower-risk choice.
Machine washing: the brands disagree
This page warns against a top-loader's center agitator. The broader picture is that most major brands say not to machine wash a pack at all. Deuter says never, because abrasion stresses the fabric and its PU coating.2 Gregory says not to machine wash packs or put them in a dryer, since both can damage protective coatings,3 and REI's general guidance is never to machine wash or machine dry a pack.1
ULA is the notable exception. It permits washing the whole pack in a top-loader or agitatorless washer, removing it before the spin cycle.4 So a blanket 'never' isn't accurate for every brand, but it is the safe default unless your pack's maker says otherwise. Some packs shouldn't even be soaked: Osprey says travel packs with its wheeled High Road chassis should not be immersed.6
Zippers, drying and your warranty
REI says not to scrub zippers, since many have water-resistant coatings, and to use a zipper lubricant for sticking zippers instead.1 That is worth remembering when working a brush around pockets.
For drying, the brands agree. Gregory says to air dry away from heat and direct sunlight with zippered pockets open,3 Osprey says to hang packs in a well-ventilated area out of direct sunlight,6 and ULA and REI both say shade or indoors because UV light degrades fabric.4,1 Cleaning also has a warranty side: Gregory's guarantee excludes damage from improper cleaning or storage.7 Following the maker's method protects the pack and your coverage.
