
Sleeping bags are designed to get dirty, and while they don't need to be washed after every trip, it is a good idea to wash them at least once a year. Most sleeping bags can be machine-washed, but it depends on the type of sleeping bag and the capacity of your washer. Sleeping bags with cotton, feather, or down fillers will take a long time to dry, so it's important to ensure that they are completely dry before storing them to prevent mold from forming.
| Characteristics | Values |
|---|---|
| Machine wash | Possible, but not recommended by some sources |
| Hand wash | Possible, but not recommended by some sources |
| Dry cleaning | Not recommended by some sources |
| Wash frequency | Every few years, depending on usage |
| Water temperature | Warm or cold, never hot |
| Cycle type | Gentle or permanent press |
| Detergent | Use soap, not detergent; avoid fabric softener, bleach, and alternatives |
| Rinsing | Rinse at least twice to ensure no soap residue remains |
| Drying | Tumble dry on low heat; add tennis balls to the dryer to separate the fill |
| Notes | Check the care label for instructions; spot-clean where possible |
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What You'll Learn

Use a front-loading washer or a top-loader without an agitator
If you want to wash your sleeping bag in a washing machine, it is recommended that you use a front-loading washer or a top-loader without an agitator. Top-loading machines with a centre agitator can shred the sleeping bag's outer lining and damage the fabric.
If you are using a front-loading washer, make sure it is large enough to accommodate your sleeping bag. It should be able to fit queen or king-sized comforters. If your home washer is too small, consider taking your sleeping bag to a laundromat to wash it in a large capacity washer.
Before washing, unzip your sleeping bag and lay it out to check for stains or damage. Pretreat any stains with an appropriate stain removal product and a laundry brush. Let the solution sit for at least 15 minutes before washing. If there are rips or tears, make any necessary repairs before washing.
When you are ready to wash your sleeping bag, use soap or a speciality detergent, not laundry detergent. Laundry detergent can stick to the fibres and fill of your sleeping bag and reduce its loft. For down sleeping bags, use a down soap or a product like Nikwax Down Wash Direct. For synthetic bags, use a product like Grangers Down Performance Wash.
Place the sleeping bag in the washer by itself and wash on the gentle cycle in warm or cold water. Wash with other damp items like towels or t-shirts to help balance the spin of the machine. Make sure to use the lowest possible water temperature and the slowest spin cycle to be gentle on your sleeping bag.
Rinse at least twice or run the sleeping bag through a second complete wash-and-rinse cycle without soap to ensure that all soap residue is gone. Check for remaining suds when the cycle ends and, if necessary, do another rinse and spin to get all the soap out.
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Wash on a gentle cycle in warm or cold water
To wash a sleeping bag, you should use a front-loading commercial washer at a laundromat. The larger capacity ensures your bag is rinsed thoroughly. If you can't get to a laundromat, use a front-loading washer at home. Avoid a top-loading washer with an agitator column because your bag could get damaged by becoming entangled or wrapped around it.
The temperature setting should be no higher than 40°C / 100°F with an extra rinse cycle. Select a faster/longer spin cycle – it is important that as much water is spun out of the bag as possible before you attempt to remove it from the drum. If the nylon bag is pooling water or feels spongy, put it through another rinse cycle. It should feel wet and damp, but not drenched. Support the entire bag (not just one end) when removing it from the washer. This helps avoid straining and ripping the seams.
For down sleeping bags, use a down soap, which is very mild and will rinse out without leaving residue. Do not use conventional laundry detergents or even ‘active wash’ products because of the harsh detergents, fillers and brighteners they contain. For synthetic bags, use a technical cleaner. Standard laundry detergent can lead to clumping or reduced loft or it can leave a film that acts as a hydrophobic agent.
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Use soap, not detergent
When it comes to washing sleeping bags, it's important to note that using soap is generally recommended over using detergent. While laundry detergents may be effective for regular clothing, they can be too harsh for the fabrics and fillings of sleeping bags.
Sleeping bags, particularly those with down fillings, require special care due to the natural oils in the feathers that give them their unique qualities. Using a standard laundry detergent can strip these oils away, affecting the water-repellent nature of the feathers and their ability to loft. The fillers and optical brighteners in detergents can stick to the filaments of down plumes and feathers, preventing them from lofting properly. This can result in clumping and a decrease in the insulating power of the sleeping bag.
Instead of detergent, it's advisable to opt for specialised soaps formulated for washing down and synthetic sleeping bags. These soaps are designed to be gentle on the materials, preserving the natural oils in down fillings and maintaining the integrity of the fabric and fillings in synthetic bags. Examples of such soaps include NikWax Down Wash Direct, NikWax Tech Wash, and Granger's Down Wash.
When washing a sleeping bag, it's important to follow the manufacturer's instructions and use the recommended amount of soap. Using too much soap can lead to oversudsing, making it difficult to rinse out completely. Leftover soap residue can cause odours, mould, and mildew to develop, so it's crucial to ensure a thorough rinse.
By using the appropriate soap and following the recommended washing techniques, you can effectively clean your sleeping bag while preserving its condition and functionality.
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Avoid fabric softener, bleach and other non-bleach alternatives
When washing a sleeping bag, it is important to avoid using fabric softener, bleach, or alternative bleach products. Bleach and alternative bleach products can be too harsh on the fabric of the sleeping bag, and fabric softener can reduce the effectiveness of the insulating material.
If you are washing your sleeping bag in a machine, always use a front-loading washer or a top-loading machine without an agitator. Agitators can strain and rip the seams of sleeping bags. If you are washing your sleeping bag by hand, fill the tub with cool or warm water and add a gentle, non-detergent soap designed for washing down and synthetic-filled items. Avoid using too much soap, as it will be harder to rinse out.
It is also important to note that washing a sleeping bag subjects it to wear and tear and decreases its loft. Therefore, it is recommended to first try spot cleaning the sleeping bag. Make a paste of a little non-detergent soap and water and use a toothbrush to gently clean the shell, focusing on areas like the hood and collar where hair and skin oils tend to accumulate. Only consider giving your sleeping bag a full wash if it is losing loft and is darkened with grime.
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Wash a sleeping bag liner instead
Sleeping bags can be washed in a washing machine, but it is not always convenient to do so due to their bulk and the risk of damage. Therefore, using a sleeping bag liner can be a more practical alternative, as it can be washed more easily and frequently without causing wear and tear to the bag itself.
Sleeping bag liners are available in various materials, including cotton, silk, wool, or polyester, and they are relatively lightweight. They act as a barrier between your skin and the sleeping bag, keeping the bag clean by preventing body oils, sweat, dirt, and sunscreen from soaking into it. This means that the liner can be washed instead of the bag, reducing the frequency of washing for the bag itself.
Liners can be washed in a normal washer, whereas sleeping bags require a front-loading washer or a top-loading machine without an agitator. The agitator's fins in a top-loading washer can shred the sleeping bag's fabric, particularly the outer lining. Additionally, the size and bulk of a sleeping bag may require the use of a large capacity washer and dryer, which may not be available at home.
By using a sleeping bag liner, you can maintain the cleanliness of your sleeping bag while also prolonging its lifespan. Liners can be washed more frequently and conveniently, reducing the need for a full wash of the sleeping bag. This helps to preserve the insulating power and temperature rating of the bag, as washing can subject it to wear and tear and decrease its loft.
To wash a sleeping bag liner, simply follow the care instructions provided by the manufacturer. Most liners can be machine-washed using a gentle cycle with cold water and a mild detergent. Avoid using fabric softener, bleach, or other harsh chemicals. Always allow the liner to air dry completely before using it again.
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Frequently asked questions
Yes, you can machine wash your sleeping bag, but there are some important things to consider. Firstly, check that your sleeping bag fits in the machine. Secondly, use a front-loading washing machine, as a top-loading machine may damage the fabric or filling.
You should wash your sleeping bag on a delicate or gentle cycle with cold water.
You should use a mild detergent or a technical detergent designed for specific fabrics. Do not use fabric softener as this may damage your sleeping bag.
Air drying your sleeping bag is the best way to preserve the outer fabric, lining, and filling. If you want to machine dry your sleeping bag, use a low heat and add tennis balls to the dryer to help redistribute the filling.
You should wash your sleeping bag whenever it is dirty, smelly, or flat. Sleeping bags should be washed at least once a year, but using a sleeping bag liner can reduce the frequency of washing.











































