Some people say you should never wash a sleeping bag because cleaning it can damage the down insulation. Others believe that cleaning your bag can actually revive old, flattened down and restore its warmth. Either way, at some point, you’re going to need to know how to clean it—and when that time comes, it’s best to understand the process. It’s not as simple as tossing it in the washer and hoping for the best.
We recommend only cleaning your sleeping bag when it really needs it. Some people may need to wash theirs more often than others. Try to minimize how frequently you wash it to help it last longer.
Taking Care of Your Bag
If you take good care of your sleeping bag, you can reduce the buildup of dirt and grime. When you’re not using it, store it properly and avoid eating or drinking inside it. That’s not always possible, of course—but try your best.
Wear Clothes or Use a Liner
Wearing clean sleep clothes or using a bag liner helps reduce direct contact between your skin and the sleeping bag. That means less sweat and body oil buildup over time—less odor, fewer bacteria! Liners are easy to clean and can even add extra warmth on chilly nights.
Spot Clean First
If only a small part of your bag is dirty, clean that area before going for a full wash. The hood and opening often collect oils and sweat from your head and face.
To spot clean:
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Use a mild soap, soft toothbrush or sponge, and water.
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Gently scrub the dirty area until it looks clean.
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Let it dry.
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Repeat if needed.
Revive the Down
If your bag sees frequent use, its insulation can flatten out over time. Down compresses, reducing loft—which means fewer air pockets to trap heat. If this happens, a proper wash using a special down cleaner can refresh the feathers and restore warmth while also removing dirt and odors.
Option 1: Use a Sleeping Bag Cleaning Service
Washing and drying a down bag at home can be time-consuming. Laundromats work, but you’ll likely spend half the day waiting on machines. The upside: it’s affordable.
If time’s tight, consider sending your bag to a professional cleaner. Rainy Pass, for example, offers down sleeping bag cleaning, though it’s pricier. But it saves time and ensures it’s done right.
Option 2: How to Machine-Wash a Down Sleeping Bag
If it’s time for a full clean, follow these steps:
01. Inspect for Damage
Check your bag for any small tears or holes before washing. Repair them first so the down doesn’t leak out during the wash.
02. Use the Right Machine
Only use a front-loading washer without an agitator. Top-loaders with agitators can be too rough and may damage the bag.
03. Inspect the Washer
Run your hand along the drum to check for anything sharp that might tear the fabric.
04. Zip It Up
Zip all zippers and secure any Velcro tabs. If your bag has a DWR (durable water repellent) coating, turn it inside out before washing so water and soap can penetrate better.
05. Set the Washer Properly
Check your bag’s care label for specific temperature and cycle recommendations. If unsure, go with a gentle cycle, 30°C (about 86°F), and slow spin.
06. Use Down-Specific Detergent or Mild Soap
For best results, use a cleaner made for down. It thoroughly cleans and helps restore loft and water-repellency. Add the recommended amount and hit “start.”
If you don’t have down detergent, use a small amount of gentle liquid soap. Too much soap can leave residue that’s hard to rinse.
Option 3: How to Hand-Wash a Down Sleeping Bag
No washer? Prefer the traditional method? Hand-washing gives you more control and is gentler on the fabric.
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Fill a bathtub or large basin with cold or lukewarm water.
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Add a small amount of down detergent or mild soap.
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Use a sponge to scrub the dirtiest parts (especially the hood and opening).
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Soak for about an hour.
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Drain the tub.
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Gently press out excess water—don’t wring or twist!
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Refill with clean water and rinse thoroughly, pressing and swishing the bag.
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Repeat the rinse until water runs clear and no more soap remains.
Drying Your Sleeping Bag
Drying takes a long time. You’ve got two options:
Option A: Tumble Dry
If you’re at home or at a laundromat, use a large dryer.
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Inspect the drum for anything sharp.
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Gently move your bag from the washer to the dryer, supporting its full weight to avoid tearing.
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Set to low heat and run for 30 minutes, then check progress.
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Continue drying for 2+ hours, checking every 20–30 minutes.
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After the first hour, toss in a few clean tennis balls or rolled-up socks to help re-fluff the down.
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Once dry, lay it flat overnight to ensure any hidden moisture evaporates and the loft fully returns.
Option B: Air Dry
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Lay the bag flat on a clean, dry surface in a well-ventilated room or a shaded outdoor area.
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Avoid direct sunlight—it can damage the fabric.
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Flip the bag every few hours to help the down dry evenly.
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As it dries, gently pull apart any down clumps to restore loft.
See? Washing your sleeping bag isn’t all that complicated. Just take your time, read the care label, and follow these steps. And if in doubt, there’s always a pro cleaner ready to help!