Sleeping bag liner

Sleeping Bag Liners are lightweight cloth sacks usually fitted inside sleeping bags to provide extra comfort, insulation, and help keep the sleeping bag clean.[1][2]

A thin bag liner may feel softer against the sleeper's skin, add 5 °F warmth to the bag (not pad), and be easily washed after use (unlike the thicker sleeping bag). A thick, fleece-like liner can increase warmth by 10-15 °F. Liners also allow a sleeper to use the liner alone, without the bag in hot conditions.[3][4] Optionally, bug-repellents, pockets, and a pillow holder can be added to liners.

A vapor barrier liner (VBL) is special type of liner that blocks the sleeper's moisture from reaching the bag, thus stopping evaporative heat loss. Usually a sleeping bag liner is used inside a VBL.

Bag Liners are issued as basic kit by various militaries including the US and British armed forces.[5]

Fabrics

Liners are made of silk, cotton, nylon and polyester among others;

Silk liners
light, soft and strong and retain much thermal insulation even when wet
Cotton
heavier and bulkier than silk and absorbs water
Synthetic [mix]
usually light, strong, and do not absorb water
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gollark: I'd assume they took some kind of pretrained language model and finetuned it on crowdsourced scenario/response pairs.
gollark: Obviously much more trustworthy.
gollark: No, it's a neural network.
gollark: Neat, it is up but just has a big terms of service thing nobody will read: https://delphi.allenai.org/

See also
  • Bivouac sack – a small, lightweight, waterproof alternative to larger tent-like shelters
  • Mosquito net – a type of meshed curtain that is draped over a sleeping area, to offer protection against bites and stings from pest insects, and thus against the diseases they may carry

References
  1. Dodd, Liz (April 22, 2019). "7 best sleeping bag liners to keep you warm under the stars". www.independent.co.uk. Retrieved August 10, 2019.
  2. "Sleeping bags and mats". www.dofe.org. The Duke of Edinburgh's Award. Retrieved August 10, 2019.
  3. "How to Choose Sleeping Bag Liners". www.rei.com. Recreational Equipment, Inc. Retrieved August 10, 2019.
  4. Pedersen, Marissa. "Best Sleeping Bag Liners Of 2019". www.theadventurejunkies.com. The Adventure Junkies. Retrieved August 10, 2019.
  5. "Clothing for Operations 'The Black Bag'" (PDF). Ministry of Defence. Archived from the original (PDF) on September 15, 2017.


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