
Sleeping bag liners are a great option for those who want to keep their sleeping bags clean and last longer. They are also useful for people who sleep in hostels or hotels, as they provide a hygienic layer between you and the bedding. Liners can also be used to increase warmth, with some adding up to 32 degrees of warmth to your sleeping bag. They come in various materials, shapes, and sizes, such as silk, fleece, cotton, mummy, rectangular, and more, allowing you to choose the most suitable option for your needs and preferences. While they can be expensive and add extra weight to your pack, many hikers and campers find them invaluable for their versatility and convenience.
| Characteristics | Values |
|---|---|
| Purpose | Keeping sleeping bag clean, added warmth, standalone sleeping bag in hot climates, hygienic sheets while travelling |
| Material | Silk, cotton, polyester, fleece, synthetic |
| Shape | Mummy, rectangular, long, standard, extra wide |
| Brands | Cocoon, Teton Sports, Sea to Summit, Brownit, Western Mountaineering, CoolMax, Thermolite, Insect Shield, Sonora, Reactor Fleece, Breeze, Comfort Blend |
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What You'll Learn

Sleeping bag liners can keep your sleeping bag clean
Sleeping bag liners are a great way to keep your sleeping bag clean. They act as a protective barrier between your body and the bag, preventing dirt, sweat, body oils, sunscreen, and other grime from building up inside the bag. This is especially useful if you're on a long hike or camping trip, as it can be difficult to keep yourself and your belongings clean in the outdoors.
Liners are much easier to clean than sleeping bags, and laundering them is simpler too. This helps to maintain the performance and longevity of your sleeping bag, as the build-up of oils and grime can affect its insulating properties. Liners are also useful if you're sleeping in hostels, hotels, or on couches, as they provide a hygienic layer between you and the bedding, which may not be clean.
Different types of liners offer varying levels of warmth, with some designed specifically for cold temperatures, such as fleece liners, and others more suitable for hot climates, like silk liners. Silk liners are lightweight and quick-drying, making them a popular choice for thru-hikes. Mummy-shaped liners are also designed to fit inside your sleeping bag, providing extra warmth and keeping your bag clean. Rectangular liners, also known as travel sheets, can be used on their own or inside a rectangular sleeping bag, offering versatility and comfort.
Some liners, like the Breeze series, are designed to wick moisture effectively, reducing any clammy feelings in warm and humid conditions. They also feature treatments like HeIQ Fresh, which neutralizes odours and keeps the liner fresh. Sleeping bag liners can be expensive and add extra weight to your pack, but many hikers believe the benefits of added warmth, cleanliness, and comfort outweigh these drawbacks.
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They can be used as a sheet in hostels or hotels
Sleeping bag liners can be used as sheets in hostels or hotels. They are a great option for travellers who want to ensure they have clean bedding when staying in hostels or budget hotels. Liners can also protect against bedbugs, which is especially useful if you're staying in a hostel or hotel with questionable cleanliness.
Liners are also useful for keeping your sleeping bag clean if you're using it in place of a sheet in a hostel or hotel. This is because they are much easier to clean than a sleeping bag, and they prevent the build-up of dirt, sweat, body oils, sunscreen, and grime on your sleeping bag. Silk sleeping bag liners, in particular, are good for keeping your sleeping bag clean as they are lightweight and easy to pack, but they are less durable than polyester or cotton liners.
If you're looking for a liner to use as a sheet in a hostel or hotel, you might want to consider a rectangular liner. Rectangular liners are also known as travel sheets and can be used on their own or inside a rectangular sleeping bag. They are a good option for people who move around a lot in their sleep, as they provide more room to move than mummy-shaped liners.
Some rectangular liners also come with a pillow sleeve, which can be useful if you're using the liner as a sheet in a hostel or hotel. Liners with built-in bug protection, such as the Insect Shield offered by Sea to Summit, are another feature to look out for if you're planning to use your liner in hostels or budget hotels.
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Liners can provide extra warmth
Sleeping bag liners can provide extra warmth, depending on the type of liner material used. Silk liners, for instance, are lightweight and ideal for most thru-hikes, offering a little extra warmth. They are also effective at controlling bag stink and keeping the sleeping pad clean. However, silk liners are not as durable as polyester or cotton liners.
Fleece liners are heavier and significantly warmer, making them a good option if you encounter very cold temperatures. Cotton liners, on the other hand, are mid-weight and ideal for travel or hostel stays. They provide no warmth when wet, so they are not recommended for backpacking or thru-hiking.
Synthetic liners, such as those made with CoolMax®, are moisture-wicking and breathable, making them suitable for humid conditions. They also offer some stretch, which can be advantageous for restless sleepers. Insulated liners, such as those made with Thermolite®, can add up to 25°F of warmth, allowing you to extend the range of a lightweight bag.
Reactor Fleece liners are another option for boosting the warmth of your sleeping bag. They can add up to 32 degrees of warmth and are thick enough to use as standalone bags in the summer. If you're looking for a lightweight option to boost thermal performance, the Reactor Extreme liner is a good choice, weighing only 9.5 ounces.
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Silk liners are lightweight but may not last as long as cotton
Sleeping bag liners are a great option for backpackers or travellers staying in hostels. They can boost the warmth of your sleeping bag, increase its usable lifespan, and improve hygiene by acting as a barrier between you and the bag, keeping sweat, dirt, and body oils at bay.
Silk liners are lightweight, wick moisture, and dry quickly. They are ideal for thru-hikes and backpacking as they offer extra warmth and cleanliness. However, silk liners may not be as durable as other options and are prone to ripping, especially if you move around a lot in your sleep. Silk is also generally more expensive than other materials.
Cotton liners are mid-weight and ideal for travel and hostel-hopping. Cotton is comfortable, moderately priced, and more durable than silk. However, it dries slower than other fabrics and offers no warmth when wet, making it unsuitable for backpacking or thru-hiking.
Other liner materials include synthetic fabrics like CoolMax, which are moisture-wicking, breathable, and stretchy, making them ideal for restless sleepers. Insulated liners, such as Thermolite, add significant warmth and dry faster than cotton. For bug-infested areas, consider a liner with built-in bug protection, such as the Insect Shield offered by Sea to Summit.
When choosing a sleeping bag liner, consider factors such as warmth, weight, packed size, shape, fabric, durability, and cost. Prioritize comfort and choose the option that best fits your needs and preferences.
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$19.99

Liners can be expensive and add extra weight to your pack
Sleeping bag liners can be expensive, with some silk liners costing upwards of $100. They also add extra weight to your pack, which is an important consideration if you're trying to travel light. However, there are a variety of liners available at different price points and weights, so you can choose the one that best suits your needs.
Liners come in different materials, such as silk, fleece, cotton, and synthetic, each with its own weight and warmth characteristics. Silk liners are lightweight and offer a little extra warmth, while fleece liners are heavier and provide more warmth. Synthetic liners are moisture-wicking and breathable, making them ideal for humid conditions, while insulated liners can add up to 25°F of warmth to your sleeping bag.
The weight and warmth of a liner depend on its material and shape. Mummy-shaped liners are typically the lightest weight option, as they are widest at the shoulders and hips and taper down to the feet. Rectangular liners are standard and are usually heavier than mummy liners. Long and extra-wide liners are also available for taller or larger individuals, but these will add more weight to your pack.
While liners can add extra weight, many hikers and campers find that the benefits outweigh the cost and weight considerations. Liners can provide added warmth and insulation to your sleeping bag, making them useful in cold weather. They also create a barrier between your body and the sleeping bag, keeping the bag clean and free from dirt, grime, and body oils. This can help extend the life of your sleeping bag, as it is much easier to launder a liner than a sleeping bag.
Additionally, liners can be used in warm weather as a standalone sleeping bag or as a sheet in hostels or hotels. They provide a hygienic barrier between you and questionable bedding, and some liners even offer bug protection. So, while liners can be expensive and add weight to your pack, they offer versatility, comfort, and cleanliness, making them a valuable addition to your camping or hiking gear.
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Frequently asked questions
Sleeping bag liners are a great way to keep your sleeping bag clean. They prevent sweat, dirt, body oils, sunscreen, and other grime from getting into your sleeping bag, which can be difficult to clean. Liners are also easier to wash than sleeping bags.
Silk liners are lightweight, luxurious, and offer a little extra warmth. They are ideal for most thru-hikes and travel in warm climates. However, silk is not as durable as other materials. Synthetic liners are moisture-wicking and breathable, making them suitable for humid conditions. Insulated liners, such as those made with Thermolite®, add significant warmth and dry faster than cotton.
Mummy-shaped liners are tapered from the shoulders to the feet, making them the lightest option. Rectangular liners, also known as travel sheets, are designed for use on their own or inside rectangular sleeping bags. Long liners are rectangular unless specified as Long Mummy and are ideal for tall people. Extra-wide liners are wider to accommodate more body types or two people.
Sleeping bag liners are beneficial in various situations. They are commonly used by backpackers, hikers, and travellers staying in hostels or hotels. Liners can provide extra warmth in cold climates and are also useful in warm climates, where they can be used as a standalone sleeping bag or travel sheet.











































