
Sleeping bags are expensive items, but they can last for decades with the correct care. While washing your bag is important, overwashing can damage its performance. A good rule of thumb is to wash your consistently used bag once a year. When washing your sleeping bag, it is recommended to use a front-loading commercial washer and dryer to prevent any damage to your gear. Never use a top-loading washing machine as the agitation can shred internal baffles and damage delicate fabrics and stitching. After washing, you should tumble dry your sleeping bag on a low heat setting to avoid damaging the fabrics and components.
| Characteristics | Values |
|---|---|
| Should sleeping bags be tumble dried? | It is recommended to tumble dry sleeping bags on low heat to prevent damage to the fabrics and components. |
| How to tumble dry a sleeping bag? | Place the sleeping bag in a large tumble dryer on low heat with a couple of tennis balls or thick rolled-up socks to prevent clumping and re-fluff the filling. |
| When to tumble dry a sleeping bag? | Tumble dry a sleeping bag after washing it. Avoid tumble drying if the sleeping bag has synthetic fabrics as high temperatures can melt them. |
| Alternative to tumble drying | Hang dry the sleeping bag, preferably in a well-ventilated, low-humidity environment. However, be aware that it may take a long time (24-48 hours) and there is a risk of mildew if the bag is not completely dry. |
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What You'll Learn
- Sleeping bags should be washed infrequently, only when dirty or odorous
- Use a specialist down wash product, not conventional laundry detergent
- Dry cleaning chemicals can strip oils from down sleeping bags
- Tumble dry on low heat with tennis balls to prevent clumping
- Store sleeping bags loose, in a cool, dry place

Sleeping bags should be washed infrequently, only when dirty or odorous
Sleeping bags are expensive items, but they can last for decades with the correct care. To keep your sleeping bag in good condition, it's important to wash it infrequently and only when necessary. Small stains and spillages can usually be cleaned with a damp soapy cloth. Dirt, grime and oils on the surface of your bag will slowly work into the fill, causing it to lose loft and warmth. A good rule of thumb is to wash your consistently used bag once a year. However, if you use a sleeping bag liner, you can keep your bag cleaner for longer and reduce the number of washes it requires.
Washing a sleeping bag is a time-consuming job, and if you have any doubts, you should consider using a professional cleaning service. If you choose to wash your sleeping bag yourself, it's important to follow the correct steps to avoid damaging the bag. Firstly, always check the care label of your sleeping bag to ensure it is suitable for machine washing and tumble drying. Secondly, never use a top-loading washing machine as the agitation can shred internal baffles and damage delicate fabrics and stitching. Instead, use a large front-loading washing machine and select a gentle cycle with cold water and a low spin speed.
When it comes to drying your sleeping bag, tumble drying is recommended as it helps to fluff out the filling and prevent clumping. However, it is important to use a low heat setting and periodically check the bag to ensure it is not getting too hot. If you do not have access to a tumble dryer, hang drying your bag is possible but can be a long process (24-48 hours). It is important to ensure the bag is completely dry before storing it, as any remaining moisture can cause mould or mildew to form.
To summarise, sleeping bags should be washed infrequently and only when they are dirty or odorous. By following the correct washing and drying procedures, you can keep your sleeping bag in good condition and prolong its lifespan.
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Use a specialist down wash product, not conventional laundry detergent
When it comes to washing a sleeping bag, it's important to use the right products to ensure it stays in good condition. While it may be tempting to reach for your usual laundry detergent, this could be a mistake. Conventional laundry detergents often contain harsh chemicals, fillers and brighteners that can damage the delicate fabrics and fillings of sleeping bags.
So, what's the alternative? Well, it's recommended to use a specialist down wash product instead. These are designed specifically for cleaning down and synthetic-filled sleeping bags. They are much milder than regular detergents, so they won't leave behind any residue that could reduce the loft of your sleeping bag. A reduced loft means reduced warmth, so it's important to keep your bag's loft as full as possible.
Specialist down wash products, such as Grangers Down Wash, Nikwax Down Wash Direct, Storm Down Wash, or Fibertec Down Wash Eco, are formulated to rinse out easily, leaving your sleeping bag clean and residue-free. This will help maintain the bag's loft and ensure it continues to perform at its best.
In addition to using the right cleaning products, it's also important to follow the correct washing and drying procedures for your sleeping bag. This includes using a front-loading washing machine on a gentle cycle, avoiding dry cleaning, bleaching or ironing, and tumble drying on a low heat setting. By following these guidelines, you can keep your sleeping bag in good condition for years to come.
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Dry cleaning chemicals can strip oils from down sleeping bags
While tumble drying is an option for sleeping bags, dry cleaning is not recommended. Dry cleaning chemicals can strip the natural oils from down sleeping bags, which help the down retain its loft. This will negatively impact the performance of the bag, as the loft is the natural insulating property of down.
Sleeping bags are expensive items, but with the correct care, they can last for decades. To keep your sleeping bag in good condition, it is recommended that you only wash it occasionally. A good rule of thumb is to wash your consistently used bag once a year. This will help to remove dirt, grime, and oils that accumulate on the surface of the bag and can work into the fill, causing it to lose loft and warmth.
If you do need to wash your sleeping bag, it is important to use the correct cleaning products and methods. Avoid using too much soap, as it can be harder to rinse out. It is also recommended to use a specialist down cleaning product such as Grangers Down Wash, Nikwax Down Wash Direct, Storm Down Wash, or Fibertec Down Wash Eco. Do not use standard laundry detergent, as it can lead to clumping, reduced loft, or leave a film that acts as a hydrophobic agent.
After washing, it is important to dry your sleeping bag thoroughly. Tumble drying on low heat is an option, but it is important to check the bag regularly to ensure it is not getting too hot, as this can damage the fabric. Adding a couple of tennis balls or other small, firm items to the dryer can help to break up clumps and ensure that the filling regains its natural loft.
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Tumble dry on low heat with tennis balls to prevent clumping
If you want to dry your sleeping bag in a tumble dryer, it is recommended that you set the dryer to a low heat. This is because high temperatures can melt synthetic fabrics and fibres, which will make sleeping in your bag extremely uncomfortable.
It is also important to tumble dry your sleeping bag for long enough. This will ensure that the insulation is dry through and through. If the bag is put away even slightly damp, mould or mildew can form. This can be difficult, and sometimes impossible, to remove.
To prevent clumping, you can add a couple of tennis balls to the tumble dryer. These will bounce around in the cycle, ensuring that the stuffing doesn't lump together. This will also help to speed up the drying process.
If you don't have any tennis balls, you can use thick rolled-up socks or other small but firm items. You can also purchase special balls designed for use in the tumble dryer, which work better than tennis balls to loft up the down.
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Store sleeping bags loose, in a cool, dry place
When storing your sleeping bag, it is important to keep it uncompressed and loose in a cool, dry place. This is because fibre migration can occur if the bag is stored in a stuff sack for long periods of time. Fibre migration occurs when the fibres of the sleeping bag pass through the fabric, which can be minimised by storing the bag loose.
A cool, dry place is ideal for storing your sleeping bag as it prevents the growth of mould or mildew. If the bag is put away even slightly damp, mould or mildew can form, compromising the performance of your sleeping bag. To prevent this, ensure your sleeping bag is completely dry before storing it away.
It is recommended to store your sleeping bag loose in a large box or pillowcase. If you must store it in a bag, use the extended storage sack it came in or something even larger. Never use a waterproof bag for long-term storage.
Additionally, it is important to keep your sleeping bag clean and dry during use, especially on extended trips. Air your sleeping bag whenever possible and dry it thoroughly before storing it away. Small stains and spillages can usually be cleaned with a damp soapy cloth, and zips should be kept clean and regularly lubed.
By following these storage instructions, you can maintain the lifespan and performance of your sleeping bag.
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Frequently asked questions
Yes, sleeping bags can be tumble dried, but only on a low heat setting. High temperatures can damage the bag.
If you don't have access to a tumble dryer, it's best to wait until you do before washing your sleeping bag. If you don't tumble dry your sleeping bag, it may develop mildew, which is very difficult to remove.
To tumble dry a sleeping bag, use a large dryer and set it to the lowest heat setting. Check the bag periodically to ensure it's not getting too hot. Add a couple of tennis balls or thick rolled-up socks to the dryer to help break up any clumps that may form during the cycle.











































