
Sleeping bags should be washed at least once a year to prevent the buildup of body oils, sweat, dirt, and grime, which can compromise the bag's loft and warmth. While washing a sleeping bag, it is important to use a detergent that is suitable for the bag's fabric. Using a standard laundry detergent on a down sleeping bag can degrade the down, as the fillers and optical brighteners can stick to the filaments of the plumes and feathers and prevent them from lofting. Therefore, it is recommended to use a down-specific detergent, such as Nikwax Down Wash Direct, or a mild soap for spot cleaning. Additionally, it is advised to use a front-loading washing machine on a gentle cycle or hand-wash the sleeping bag to avoid damage to the ultralight fabrics and seams.
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What You'll Learn

Washing machine or hand washing
Yes, you can use Downy when washing a sleeping bag, and there are a few things to consider when deciding whether to use a washing machine or hand washing. Firstly, check the care label on your sleeping bag for specific instructions and recommendations from the manufacturer. Some sleeping bags may be suitable for machine washing, while others may require hand washing, especially those made with more delicate materials or insulation.
If your sleeping bag can be machine washed, use a gentle cycle with cold water to prevent damaging the bag or melting the insulation. Choose a mild detergent, and consider adding Downy fabric softener to the rinse cycle. Fabric softener can help restore the water-repellent finish on the fabric of your sleeping bag and make it feel softer and more comfortable. It is crucial to use the right amount of product as instructed on the packaging.
When using a washing machine, ensure that your sleeping bag has enough space to move around freely in the washer. It is recommended to wash bulky items like sleeping bags in a front-loading washing machine, as a top-loader may not have sufficient room for the bag to agitate properly. If your machine has a soak setting, you can use it to allow the detergent and fabric softener to work more effectively.
For hand washing, fill a large tub or your bathtub with cold water and add a mild detergent and Downy fabric softener. Immerse the sleeping bag in the water and gently agitate it by hand, ensuring that the detergent and fabric softener are evenly distributed. Rinse the sleeping bag thoroughly with cold water to remove any soap residue.
Whether you use a washing machine or hand wash your sleeping bag, it is essential to dry it properly. Line drying is recommended as a gentle way to dry your sleeping bag. However, if you want to machine dry it, use a low heat setting and consider adding dryer balls or a dryer sheet to help distribute heat evenly and prevent the insulation from clumping. Ensure that your sleeping bag is entirely dry before storing it away to prevent mildew and odours.
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How to dry a sleeping bag
Whether you have a down or synthetic sleeping bag, it is important to keep it clean, dry, and protected. Here are some tips for drying a sleeping bag:
Drying a Down Sleeping Bag
Down sleeping bags can take several hours to dry thoroughly. To dry a down sleeping bag, it is recommended to use a dryer on low heat. If you are using a home dryer, it is safe to dry your down sleeping bag with clean tennis balls or dryer balls. The humidity in the dryer will keep the heat down, and the balls will help break up clumps of down to speed up the drying process.
If you are air-drying a down sleeping bag, lay it flat on a clean surface in an area with low humidity and no direct sunlight. You can also hang it up to dry, but be careful to distribute the weight evenly to avoid putting too much stress on the nylon fabric.
Drying a Synthetic Sleeping Bag
Synthetic sleeping bags will dry much quicker than down sleeping bags. To dry a synthetic sleeping bag, you can use a dryer on low heat or air dry it. If you are using a dryer, be aware that high heat can melt the delicate nylon fabric.
General Tips for Drying Sleeping Bags
- Avoid dry cleaning your sleeping bag as the industrial solvents can strip the natural oils from the down, affecting its ability to retain loft.
- Avoid using fabric softener, bleach, or alternative bleach products.
- Avoid drying your sleeping bag in direct sunlight for extended periods, as UV light can degrade the fabric over time.
- Ensure your sleeping bag is thoroughly dry before placing it in its storage bag. You can lay it out or hang it up overnight to ensure it is completely dry.
By following these tips, you can ensure that your sleeping bag is properly dried, maintaining its insulation and longevity.
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Spot cleaning
It is important to keep your sleeping bag clean, dry, and protected. Body oils, sweat, dirt, and grime can affect the insulating power of your sleeping bag. To prevent dirt buildup, use a bag liner and sleep in clean clothes.
If your sleeping bag is stained or dirty, spot cleaning is an option. Here are some steps you can follow to spot clean your sleeping bag:
- First, check the care instructions on the tag before attempting to clean the sleeping bag.
- Next, apply a small amount of detergent to the stained area. Use a mild, fragrance-free detergent or soap that is specifically designed for washing sleeping bags. Avoid using standard laundry detergent as it can contain fillers and brighteners that may stick to the fabric and affect its performance.
- Gently scrub the stain with a soft-bristled toothbrush. Be careful not to get the filling of the bag wet. If it does get wet, ensure that you allow it to air dry completely before storing it.
- Rinse the area with a clean, wet sponge.
- Finally, allow the spot-cleaned area to dry completely before storing the sleeping bag.
If your sleeping bag requires a more thorough cleaning, you can consider hand washing it in a bathtub or using a commercial washer and dryer at a laundromat. Always follow the manufacturer's instructions and recommendations for cleaning and drying your sleeping bag.
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How often to wash a sleeping bag
The frequency with which you should wash your sleeping bag depends on a few factors. Firstly, it is important to note that washing a sleeping bag causes wear and tear and decreases its loft, so it is recommended to spot clean whenever possible. If you use a sleeping bag liner, you will also need to wash your sleeping bag less often. Liners can be made of cotton, silk, wool, or polyester, and they act as a barrier between your skin and the bag, keeping it clean. Sleeping in clean clothes and wiping off sunscreen, as well as changing out of clothes you cooked in, will also help keep your bag clean for longer.
However, if your sleeping bag is visibly darkened with grime or is losing its fluffiness (loft), it is time to wash it. The buildup of body oils, sweat, dirt, and grime over time will migrate into the fill of both down and synthetic sleeping bags, compromising the loft and warmth. It is recommended to wash your sleeping bag at least once a year, but if you use it more frequently, you may need to wash it more often. It is a good idea to wash your bag before storing it at the end of the season or for an extended period, as body oils and other residues will stay on the fabric if the bag is packed away without a wash.
To wash your sleeping bag, you can use a commercial-size washer and dryer at a laundromat, a front-loading washer at home, or hand wash it in a bathtub. If using a machine, make sure it is a front-loading washer or a top-loader without an agitator, as the agitator can damage the bag. Wash on a gentle cycle in warm or cold water with a soap specifically formulated for down or synthetic sleeping bags, such as Grangers Down Wash or Grangers Down Performance Wash. Rinse at least twice to ensure all soap residue is gone, and then dry on low heat, as high heat can melt the fabric. The drying process can take several hours, especially for down sleeping bags.
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Using a sleeping bag liner
Sleeping bag liners are a great way to keep your sleeping bag clean and make it last longer. They act as a barrier between your skin and the bag, preventing dirt and body oils from building up on the bag. Liners are available in various materials, such as cotton, silk, wool, or polyester, and are lightweight and breathable. They can also add extra warmth to your sleeping bag, increasing its temperature rating by 5 to 15 degrees Fahrenheit.
Using a liner means you won't have to wash your sleeping bag as often, which is beneficial because washing a sleeping bag can be labor-intensive and cause wear and tear. When washing a sleeping bag, it's important to avoid using standard laundry detergent, as the fillers and brighteners can stick to the fibres and down plumes, reducing loft and insulation. Instead, use a soap specifically formulated for down or synthetic bags.
If you do need to wash your sleeping bag, there are a few methods you can use. You can hand wash it in a bathtub or use a commercial washer and dryer at a laundromat. If washing at home, use a front-loading machine on a gentle cycle, and avoid top-loading machines with agitators, as they can damage the bag. Always ensure your sleeping bag is completely dry before storing it, and never store it compressed in its stuff sack, as this will damage the fill.
Sleeping bag liners are particularly useful for backpackers and travellers staying in hostels or budget hotels. They can provide a hygienic barrier between you and questionable bedding, and some liners even offer bug protection. When sleeping outdoors, liners designed for use inside a sleeping bag, such as the Reactor series, are recommended to ensure warmth.
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Frequently asked questions
No, you should not use Downy when washing a sleeping bag. It is recommended to use a soap specifically formulated for down or a performance wash product for synthetics.
It is recommended to wash your sleeping bag at least once a year for moderate use, and 2-3 times a year if it is in heavy rotation.
You can either hand wash your sleeping bag in a bathtub or use a front-loading washing machine on a gentle cycle. If you are hand washing, turn the sleeping bag inside out, place it in the tub, and add warm water and the recommended amount of the appropriate soap. Gently knead the sleeping bag to force water and soap through it. If you are using a washing machine, wash your bag on a gentle cycle with cold water and a down-specific detergent.











































