
Backpacking sleeping bags are a significant investment, and proper care and cleaning will ensure they last for years, if not decades. Washing a sleeping bag is a simple process that can be done by hand or machine, and it is recommended to do so at least once a year. This guide will cover the steps to clean and maintain a backpacking sleeping bag, including how to address small tears and holes, and the best ways to dry and store your bag to maintain its loft and insulating power.
How to Wash a Backpacking Sleeping Bag
| Characteristics | Values |
|---|---|
| When to wash | When darkened with grime, losing fluffiness (loft), or smelling bad |
| How often to wash | Once a year at a minimum; more often if used frequently |
| Best time to wash | Before storing for an extended period |
| How to prevent dirt buildup | Use a bag liner, sleep in clean clothes, and <co: 2,6>air out the bag to dry |
| Washing machine | Use a front-loading commercial washer at a laundromat; avoid top-loading washers with agitator columns |
| Hand washing | Wash in a clean bathtub with warm water and appropriate soap, gently kneading the bag |
| Drying | Use a commercial dryer; if using a home dryer, set it to low heat |
| Repairs | Sew up small holes by hand or use adhesive gear-repair tape; for serious damage, consider professional repair |
| Storage | Store in a dry place where it can spread out, such as a large breathable bag or hung up on a hook |
| Stuff sack | Use a slightly larger stuff sack than necessary, preferably a compression or waterproof sack |
| Soap | Use soap specifically formulated for down, such as Nikwax Down Wash or Grangers Down Wash |
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What You'll Learn

How to hand wash a sleeping bag
Hand washing a sleeping bag is a more involved process than using a machine, but it can be gentler and equally effective at cleaning your bag. It's also a good option if you don't have access to a large front-loading dryer or a suitable washing machine.
First, fill a bathtub with 4-5 inches of lukewarm water. Turn your sleeping bag inside out and close all zippers. If your sleeping bag is made of down, use a soap specifically formulated for down, like Grangers Down Wash or Nikwax Down Wash Direct. Mix the soap into the water according to the instructions on the bottle. Avoid using too much soap, as it will be harder to rinse out.
Once the soap is mixed in, gently place your sleeping bag in the water. Work the soap throughout the entire bag, paying extra attention to heavily soiled areas. Allow the bag to soak for up to an hour. After soaking, drain the tub and gently press out any remaining water.
Next, you'll need to rinse the bag. Refill the tub with cool or warm water, and gently work the soap out of the bag. Let the bag sit in the water for 15 minutes, then drain the tub again. Repeat the rinsing process until all the soap is removed. Gently squeeze out as much water as you can from the bag, being careful not to pick it up when it's full of water.
Finally, it's time to dry your sleeping bag. If using a dryer, carry the bag to the machine, supporting the entire bag and not just one end. Dry on the gentlest setting, with low to no heat. Toss in 3-6 dryer balls, tennis balls, or a clean pair of sneakers (in socks) to help break up any clumps that form in the down. If you don't have access to a dryer, you can air dry your sleeping bag. However, this can take a long time, from hours to days. You can also treat the bag with spray-on Durable Water Repellent to make the nylon more water-resistant.
It's important to note that you should avoid washing your sleeping bag too frequently, as this can damage the insulation and reduce its loft. It's recommended to wash your bag at least once a year, or more often if you use it frequently. A good time to wash your bag is before storing it for an extended period, such as at the end of the season.
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How to machine wash a sleeping bag
Machine washing a sleeping bag is a straightforward process, but it does require some care and attention. Firstly, check the bag for any small holes or tears and repair them before washing, as the agitation of the machine could cause them to become worse.
Next, consult the bag maker's instructions for washing and care. If you are unable to find these, it is generally recommended to use a front-loading washing machine, as top-loading machines with an agitator can be too rough on the fabric and seams of sleeping bags, causing damage. If you only have access to a top-loading machine, ensure it does not have an agitator.
When you are ready to wash, select a gentle cycle with warm or cold water. If your machine has a delicates' setting, this is a good option. Use a mild soap designed for down or synthetic fabrics, depending on your bag. Avoid standard laundry detergents, as these can leave residue and reduce the loft of your sleeping bag. Only use about two-thirds of the amount of soap recommended by the manufacturer to avoid over-sudsing, and be sure to rinse the bag at least twice to remove all the soap.
To help balance the spin of the machine, you can add a few other damp items such as towels or t-shirts. If your bag is synthetic, you can put it through a normal wash cycle without issues. However, if it is down, it is recommended to use a delicate cycle with a temperature setting of no higher than 40°C/100°F.
Once the wash cycle is complete, the bag should be carefully removed from the machine, supporting its full weight to avoid straining and ripping the seams. Gently squeeze out any excess water, and if possible, run the bag through an extra rinse cycle to ensure all soap residue is gone.
Finally, dry the bag on low heat, checking frequently to ensure the fabric is not melting. For down bags, add two or three clean tennis balls or a pair of clean sneakers to the dryer to help fluff up the down.
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How to dry a sleeping bag
Drying a sleeping bag is a crucial step in the cleaning process, as it ensures your bag is ready for storage or immediate use. Here is a detailed guide on how to dry a sleeping bag:
Drying Techniques:
- Air Drying: This is the most commonly recommended method for drying a sleeping bag. It is important to air out your bag after each use, especially before storing it. Unzip the bag and hang it up to ensure it is completely dry. You can also use a large cotton or mesh storage sack, a pillowcase, or a DIY cotton bag for air drying.
- Machine Drying: If you have access to a dryer, you can use it to dry your sleeping bag. Place the damp bag in a large laundry sack before putting it in the tumble dryer. Set the dryer to low heat or the 'delicates' setting. If using a commercial dryer, remember that the thermostats may be imprecise, so opt for a cooler cycle.
- Sun Drying: Drying your bag during a sunny day is also an option, especially if you're on a longer trip. However, be cautious as direct sunlight can damage certain materials.
Tips for Effective Drying:
- Avoid Dry Cleaning: The chemicals used in dry cleaning can strip the natural oils from down fillings, affecting their ability to loft.
- Use Proper Detergents: When washing, ensure you use detergents suitable for your bag type. Mild soaps designed for down or synthetic fillings are best. Avoid conventional laundry detergents as they can leave residue and affect lofting.
- Spin Cycle: Before removing your bag from the washer, select a faster spin cycle to remove as much water as possible. This will reduce the time needed for drying.
- Protect Delicate Materials: If your sleeping bag has a very light shell or liner, consider using a large cotton sack during the drying process to protect the material.
- Avoid High Heat: Whether using a machine dryer or sun drying, avoid high temperatures. High heat can damage delicate nylon fabrics and other materials.
Remember, the drying time will vary depending on the type of sleeping bag you have. Synthetic bags will dry quicker, usually within an hour, while down sleeping bags can take several hours to dry thoroughly. Always ensure your bag is completely dry before storing it to maintain its insulating power and longevity.
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How to prevent dirt buildup
To prevent dirt buildup in your backpacking sleeping bag, it is important to take care of it while at camp. Here are some tips to keep your sleeping bag clean and prevent dirt buildup:
- Use a sleeping bag liner: A liner acts as a barrier between your skin and the bag, keeping the bag clean. Liners can be made of cotton, silk, wool, or polyester and are lightweight and fairly easy to carry.
- Sleep in clean clothes: Change into clean long underwear and socks before getting into your sleeping bag. If the weather is warm, wear at least a clean T-shirt and underwear. Avoid crawling into your sleeping bag with the same clothes you hiked in, as body oils, sweat, and dirt can accumulate and reduce the bag's insulating power over time.
- Wipe off sunscreen: Before going to bed, wipe off any sunscreen from your face and neck, as these can soak into your bag.
- Change out of cooking clothes: If you've been cooking, change out of those clothes before getting into your bag, especially if you're in bear country. Cooking odors can attract wildlife, and you don't want your bag to absorb those smells.
- Spot clean: If your bag has small areas of dirt, you can spot clean it. Apply a mild soap or down wash to the dirty area, use a soft-bristled toothbrush to gently scrub, and then rinse with a wet sponge. By holding the fabric away from the insulation, you can avoid getting the inner fill wet.
- Air out your bag: Turn your bag inside out and air it out daily, especially if it gets damp. This will help dry out any moisture and prevent the buildup of mold or mildew. However, avoid leaving your bag in direct sunlight for too long, as UV light can degrade the fabric over time.
- Store it properly: When not in use, store your sleeping bag in a dry place where it can spread out. Never store it compressed. Hanging it on a hook in a dry closet or storing it in a large, breathable bag will help maintain its loft and keep it fresh.
By following these simple steps, you can significantly extend the life of your backpacking sleeping bag and keep it clean and dirt-free.
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How to store a sleeping bag
Properly storing your backpacking sleeping bag is simple yet important to prolong its life and ensure your comfort when sleeping outdoors. Here's how to do it:
Clean the Sleeping Bag
Before storing your sleeping bag, it's a good idea to clean it, as natural body oils, sweat, dirt, and grime can build up on the fabric and insulation fibres over time, reducing the bag's effectiveness and potentially resulting in a cold night's sleep. Spot-clean your bag after each use by wiping away any dirt or debris from the exterior with a soft toothbrush or a slightly damp cloth. You can also turn the bag inside out and use a dedicated technical soap to spot-clean any stains or marks.
Dry the Sleeping Bag
After cleaning, ensure your sleeping bag is thoroughly dry before storing it. Hang it in a cool, dry place, out of direct sunlight, for at least 4 to 6 hours. If airing indoors, avoid hot and humid areas, such as a hot water cupboard, as warm air can damage the bag over time. Instead, hang it over a clothes airer and use a fan to keep the air circulating. You can also use a dehumidifier to speed up the drying process.
Choose a Storage Container
Avoid storing your sleeping bag in its stuff sack for extended periods, as this can cause it to lose loft and insulation capacity. Instead, opt for a large, breathable cotton or mesh sack, which most bags are sold with today. These bags allow for better air circulation and help maintain the bag's original shape. If your bag didn't come with a large storage sack, you can use a king-size pillowcase or purchase a cotton or mesh sack (around 50L to 90L in volume).
Store in a Cool, Dry Location
Finally, choose a storage location that is cool and dry. Avoid damp basements, unheated or uncooled spaces like garages and attics, and areas with high humidity. If possible, store the bag in a roomy closet or under your bed, fully unrolled and uncompressed. If space is limited, you can hang the bag in a dry, temperature-controlled area, ensuring it is not crushed or compressed.
By following these steps, you'll be able to keep your backpacking sleeping bag in top condition and ready for your next outdoor adventure.
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Frequently asked questions
If your sleeping bag is darkened with grime or is losing its fluffiness, it's time to give it a wash. The buildup of body oils, dirt, and grime will compromise your bag's loft and warmth.
There's no need to wash your bag after every trip, but it's a good idea to launder it at least once a year. If you're using your bag more frequently, you may want to wash it more often. It's also a good idea to wash your bag before storing it for an extended period.
You can either hand wash your sleeping bag in a bathtub or use a commercial-size washer and dryer at a laundromat. If using a machine, opt for a front-loading washer on a gentle cycle, and avoid top-loading washers with agitator columns. When drying, use a commercial dryer on low heat, as high heat can melt delicate nylon fabrics.
Avoid using standard laundry detergent, as the fillers and brighteners can stick to the bag's fibers and reduce its loft. Instead, opt for soap specifically formulated for down, such as Grangers Down Wash or Nikwax Down Wash. For synthetic bags, use a product like Grangers Down Performance Wash.











































