
Sleeping bags are designed to keep you warm and dry in outdoor conditions, but they can sometimes retain unpleasant odours. Sleeping bags can smell due to a variety of factors, including dirt, moisture, mildew, and body oils. To prevent sleeping bags from smelling, it is important to keep them dry, air them out, and wash them regularly with gentle detergents and deodorizers. Additionally, sleeping in clean clothes and using a liner can help maintain the cleanliness of the bag. Proper care and maintenance of sleeping bags involve understanding their specialty fabric and fillings, which may require specific care instructions.
| Characteristics | Values |
|---|---|
| Reason for smell | Dirt, moisture, mildew, rotting, condensation, body oils, sweat, and bacteria |
| Prevention | Avoid wetness, use a camping cot, air mattress, or pillowcase, sleep in clean clothes, use a liner, or air out the bag |
| Cleaning | Wash and dry the bag, use specialised liquid detergents, Revivex Odor Eliminator or cleaners, or vinegar, wash with gentle soap, rinse twice, dry on low heat, and store loosely in a cotton or mesh sack |
| Storage | Avoid storing compressed in its stuff sack, use a large cotton or mesh sack, or a pillowcase |
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What You'll Learn
- Sleeping bags can smell due to dirt, moisture, and bacteria
- The type of cleaner and detergent used can affect the smell
- Sleeping bags should be washed, dried, and stored correctly
- Body oils, sweat, and dirt can affect the smell of a sleeping bag
- Using a sleeping bag liner can keep the bag clean and odour-free

Sleeping bags can smell due to dirt, moisture, and bacteria
Sleeping bags can sometimes take on a funky, musty smell. This is often caused by dirt, moisture, and bacteria. Dirt and moisture can create an environment that promotes the growth of bacteria, mould, and fungi, which release acids that break down the natural oils in the feathers, causing an unpleasant odour.
Even if you cannot feel the moisture, it is usually present in small amounts and can cause a musty smell. This is a sign that the bag needs to be washed and dried as soon as possible. Washing the sleeping bag regularly can help to prevent the build-up of dirt, moisture, and bacteria, keeping it smelling fresh. It is recommended to hang the bag to dry rather than storing it in a bag, as this allows for better air circulation and prevents the growth of odour-causing bacteria.
In some cases, the smell may be due to the synthetic fabric of the sleeping bag or the chemicals used in its manufacturing. However, this type of smell should fade over time with regular use and washing. It's important to note that washing a sleeping bag too frequently can also be detrimental, as it can strip the natural oils from the feathers, so spot cleaning and airing out the bag between washes is often sufficient.
To prevent sleeping bag odours, it is crucial to keep the bag clean and dry as much as possible. This includes using a liner or a clean base layer to protect the bag from body oils and dirt. Additionally, allowing the bag to air out during the day and ensuring it is thoroughly dried before storing can help prevent the growth of bacteria and mould. Proper care and maintenance of a sleeping bag can ensure it remains odour-free and comfortable for many adventures.
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The type of cleaner and detergent used can affect the smell
Sleeping bags can develop an odour due to various factors, such as dirt, moisture, mildew, or even rotting. The type of cleaner and detergent used to wash and maintain them can significantly impact their smell and longevity.
For synthetic sleeping bags, it is generally advised to avoid using cleaners with detergents. The chemicals present in detergents can negatively affect the synthetic material. Instead, opt for a gentle, detergent-free cleaner specifically designed for synthetic fabrics. These cleaners will effectively remove any dirt, body oils, or sweat accumulated during use, ensuring your sleeping bag remains odour-free and well-maintained.
On the other hand, down sleeping bags require special care due to their delicate nature. It is crucial to select a cleaner that can effectively clean the bag without damaging the down feathers. Campers often prefer products like Nikwax's Down Wash or Down Proof options. Additionally, some natural remedies, such as vinegar, can be effective in eliminating odours from down sleeping bags. The vinegar smell typically dissipates quickly, leaving your bag refreshed.
Proper drying and storage practices are also essential to prevent unpleasant smells. Sleeping bags should be dried thoroughly and stored loosely in large cotton or mesh sacks to allow for adequate air circulation. Hanging the bag is preferable to compressing it, as this can affect the bag's loft and insulation over time.
Furthermore, preventative measures can be taken to minimise the frequency of washing. These include sleeping in clean clothes, using a clean base layer, and keeping oily hair away from the bag's hood with a clean bandana or knit cap. By following these tips and choosing the right cleaners and detergents, you can effectively manage the smell of your sleeping bag and prolong its lifespan.
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Sleeping bags should be washed, dried, and stored correctly
Sleeping bags can develop a funky musty smell due to dirt, moisture, bacteria, mould, fungi, or body oils. To prevent this, sleeping bags should be washed, dried, and stored correctly.
Firstly, to wash your sleeping bag, check the bag maker's instructions. You can hand wash the bag in a bathtub, or use a commercial-size washer and dryer at a laundromat. If you use a machine, opt for a front-loading commercial washer, as the larger capacity ensures your bag is rinsed thoroughly. Avoid a top-loading washer with an agitator column, as your bag could get damaged by becoming entangled or wrapped around it. When washing your bag, use a gentle, non-detergent soap that is made for washing down- and synthetic-filled items. Fill the tub with cool or warm water and add the appropriate cleaner for your bag type. Never use fabric softener, bleach or alternative-bleach products.
After washing, gently squeeze out the excess water and proceed to dry your sleeping bag. Drying will take at least two to three hours, with down bags taking longer than synthetic. Dry your bag on low heat, as high heat can melt delicate nylon fabrics. For down sleeping bags, add two to three tennis balls to help agitate the fill back to its original loft. The balls help break up clumps of down to speed the drying process. For synthetic bags, tennis balls are optional. Run as many cycles as needed to completely dry the bag, for at least an hour. Alternatively, you can air dry your bag by laying it flat on a clean surface in an area with low humidity and no direct sunlight, or hang it up to dry, being careful to distribute the weight so as not to put too much stress on the fabric.
Finally, to store your sleeping bag correctly, ensure it is thoroughly dry. Then, extract it from its stuff sack and loosely stow it inside a large breathable cotton or mesh sack. Store it in a cool and dry place, avoiding damp basements and unheated or uncooled spaces like garages and attics.
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Body oils, sweat, and dirt can affect the smell of a sleeping bag
It is important to keep your sleeping bag clean, dry and protected while camping. This will ensure that it lasts longer and insulates efficiently. Sleeping bags should be washed, dried, and stored properly. Most sleeping bags can be machine washed in a front-loading washer or a top-loading machine without an agitator. They should be washed on a gentle cycle with warm or cold water and an appropriate soap, using as little soap as possible to avoid over-sudsing. Rinse at least twice, or run a second soap-free wash-and-rinse cycle to ensure all soap residue is removed.
After washing, dry the sleeping bag on low heat, checking often as machine heat varies, and synthetic fabric can melt if it gets too hot. When the bag is nearly dry, add two or three clean tennis balls or a pair of lightweight, clean sneakers to the dryer. Once dry, store the bag loosely in a large cotton or mesh sack, or a pillowcase if you don't have a sack. Avoid compressing the bag for extended periods, as this will reduce its loft or insulation.
Dampness and excess moisture can also cause sleeping bags to develop a musty odour and can lead to mildew or rotting. To prevent this, ensure your sleeping bag is completely dry before storing it and store it off the ground, as condensation can occur on the floor of a tent. Hanging a bag is a good way to ensure it is dry and to store it.
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Using a sleeping bag liner can keep the bag clean and odour-free
Sleeping bags are made with specialty fabric and fills designed to keep you warm and dry in outdoor conditions. However, the care and maintenance of sleeping bags differ from that of regular linens and bedding. Sleeping bags can develop unpleasant odours due to bacteria, mould, fungi, or dirt and moisture. To prevent this, it is essential to keep the sleeping bag clean and dry.
A sleeping bag liner is a thin sheet that lines the sleeping bag and can be used on its own or in combination with the bag. It helps to keep the sleeping bag clean by taking on the brunt of the dirt and body oils, thereby reducing the need for frequent laundering of the bag itself. Liners are typically made of cotton or silk, with natural fibre liners feeling softer and more comfortable against the skin. Cotton liners are also more breathable, providing a more comfortable night's sleep.
Using a liner can extend the use of a sleeping bag, bringing it out earlier and putting it away later in the year. It can also provide extra warmth, with some liners adding up to 25°F of warmth. In hot climates, the liner can be used without the sleeping bag, providing a more comfortable alternative to going without. Additionally, in places with questionable cleanliness, such as hostels or Alpine huts, a liner can provide a hygienic barrier between you and the bedding.
Sleeping bag liners offer a versatile solution for backpackers and travellers, helping to maintain the cleanliness and longevity of their sleeping bags while also providing added comfort and warmth when needed. By using a liner, individuals can reduce the frequency of washing their sleeping bags, which can be a more cumbersome task.
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Frequently asked questions
Sleeping bags can smell bad due to excess moisture, which can cause mildew or rotting. This dampness may be caused by condensation or the inability to dry the bag completely.
To prevent your sleeping bag from smelling bad, ensure that it is completely dry before storing it. It is recommended to air out the bag and store it loosely in a large cotton or mesh sack. Additionally, avoid crawling into your bag with dirty clothes, as body oils, sweat, and dirt can affect the insulating power of the bag.
If your sleeping bag still smells bad after washing it, you can try using a specialised cleaner like Revivex Odor Eliminator, Nikwax Down Wash, or Mirazyme Odor Eliminator. Alternatively, some people have found success using vinegar to eliminate odours.






















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