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Sleeping bag liners are lightweight cloth sacks usually fitted inside
Sleeping bag liners are lightweight cloth sacks usually fitted inside sleeping bag
A sleeping bag is an insulated covering for a person, essentially a lightweight quilt that can be closed with a zipper or similar means to form a tube, which functions as lightweight, portable bedding in situations where a person is sleeping o ...
s to provide extra comfort, insulation, and help keep the sleeping bag clean.
A thin 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. Optionally, bug-repellents, pockets, and a pillow holder can be added to liners.
A vapor barrier
A vapor barrier (or vapour barrier) is any material used for damp proofing, typically a plastic or foil sheet, that resists diffusion of moisture through the wall, floor, ceiling, or roof assemblies of buildings and of packaging to prevent inter ...
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.
Sleeping bag liners are issued as basic kit by various militaries including the US and British
British may refer to:
Peoples, culture, and language
* British people, nationals or natives of the United Kingdom, British Overseas Territories, and Crown Dependencies.
** Britishness, the British identity and common culture
* British English, ...
armed forces.
Fabrics
Liners are made ofsilk
Silk is a natural protein fiber, some forms of which can be woven into textiles. The protein fiber of silk is composed mainly of fibroin and is produced by certain insect larvae to form cocoons. The best-known silk is obtained from the coc ...
, cotton
Cotton is a soft, fluffy staple fiber that grows in a boll, or protective case, around the seeds of the cotton plants of the genus ''Gossypium'' in the mallow family Malvaceae. The fiber is almost pure cellulose, and can contain minor perce ...
, nylon
Nylon is a generic designation for a family of synthetic polymers composed of polyamides ( repeating units linked by amide links).The polyamides may be aliphatic or semi-aromatic.
Nylon is a silk-like thermoplastic, generally made from petro ...
and polyester
Polyester is a category of polymers that contain the ester functional group in every repeat unit of their main chain. As a specific material, it most commonly refers to a type called polyethylene terephthalate (PET). Polyesters include natural ...
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 ix usually light, strong, and do not absorb water
See also
*Bivouac sack
A bivouac shelter is any of a variety of improvised camp site, or shelter that is usually of a temporary nature, used especially by soldiers, or people engaged in backpacking (hiking), backpacking, bikepacking, scouting, or Mountaineering, mount ...
– a small, lightweight, waterproof alternative to larger tent-like shelters
* Mosquito net
A mosquito net is a type of meshed curtain that is circumferentially draped over a bed or a sleeping area, to offer the sleeper barrier protection against bites and stings from mosquitos, flies, and other pest insects, and thus against the di ...
– 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
Camping equipment Insulators Bedding Bags {{Camping-stub