NationMaster - Encyclopedia: Sleeping bag

A sleeping bag is a protective "bag" for a person to sleep in, essentially a blanket that can be closed with a zipper or similar means, and functions as a bed in situations where it is impractical to carry around a full bed. Its primary purpose is to provide warmth and insulation. It also protects, to some extent, against wind, precipitation, and exposure to view, but a tent performs those functions better. The bottom surface also provides some cushioning, but a sleeping pad is usually used for that purpose. A bivouac sack (bivy) is a waterproof cover for a sleeping bag that may be used in place of a tent for lightweight travelers or as a backup if inclement weather occurs. For other uses, see Sleep (disambiguation). ... It has been suggested that Wool blankets be merged into this article or section. ... A double bed A bed is a piece of furniture or location primarily used or intended for sleeping upon, but also commonly used for sexual activities, relaxing, sitting, and reading. ... For other uses, see Wind (disambiguation). ... Look up exposure in Wiktionary, the free dictionary. ... This article does not cite any references or sources. ... rolled sleeping pad self inflating camping mat In camping, a ground pad, sleeping pad, sleeping mat or roll mat is a simple device often used in conjunction with a sleeping bag. ... Climbers bivouac outside an hermitage in Europe In mountaineering, a bivouac, bivy, or bivy sack, is an extremely lightweight alternative to traditional tent systems. ...

Design types

A basic sleeping bag is simply a square blanket, fitted with a zipper on one or two sides, allowing it to be folded in half and secured in this position. A sleeping bag of this type is packed by being folded in half or thirds, rolled up, and bound with straps or cords. The basic design works well for most camping needs but is inadequate under more demanding circumstances. The second major type of sleeping bag, sometimes called a mummy bag because of its shape, is different in a number of important ways. Image File history File linksMetadata Download high resolution version (2048x1536, 685 KB) Summary Licensing File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Sleeping bag Metadata This file contains additional information, probably added from the digital camera or scanner... Image File history File linksMetadata Download high resolution version (2048x1536, 685 KB) Summary Licensing File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Sleeping bag Metadata This file contains additional information, probably added from the digital camera or scanner... It has been suggested that Wool blankets be merged into this article or section. ... Zipper slider brings together the two sides A zipper (British English: zip fastener or zip) is a popular device for temporarily joining two edges of fabric. ... A strap is a strip, usually of fabric or leather. ... A mummy is a corpse whose skin and dried flesh have been preserved by either intentional or accidental exposure to chemicals, extreme cold, very low humidity, or airlessness. ...

The volume of a solid object is the three-dimensional concept of how much space it occupies, often quantified numerically. ... Area is the measure of how much exposed area any two dimensional object has. ... For other uses, see Foot (disambiguation). ... A stuff sack is a type of drawstring bag, usually used for storing camping items. ... A compression sack is a special type of stuff sack, designed particularly for the storage of bulky sleeping bags in internal-frame backpacks. ...

Fill

Many different insulating materials are available for sleeping bags. Outdoor professionals usually prefer either synthetic fill or down, and they have debated the merits of these materials for years. Image File history File linksMetadata Download high-resolution version (2592x1944, 2507 KB) A photo of a highly compact sleeping bag next to a ruler for scale. ... Image File history File linksMetadata Download high-resolution version (2592x1944, 2507 KB) A photo of a highly compact sleeping bag next to a ruler for scale. ... The down of birds is a layer of fine feathers found under the tougher exterior feathers. ...

Synthetic fill does not readily absorb water, dries easily, and provides some warmth even when thoroughly soaked. These properties may save the owner's life if, for example, the sleeping bag is accidentally dropped into water on a cold day. Synthetic material is also firm and resilient, so it insulates well even underneath a person's weight. Synthetics also have the ability to loft faster than down, allowing the sleeping bag to provide the insulation faster than a down bag. On the flipside, synthetic fill cannot be compressed as much as down, causing such bags to take up more space when not in use. Impact from a water drop causes an upward rebound jet surrounded by circular capillary waves. ...

Down fill weighs less than synthetic and retains heat better, but usually costs more. Down must be kept dry; a soaked down sleeping bag may provide even less insulation than no sleeping bag at all, leading to hypothermia. Newer, more technically advanced sleeping bags often have water-resistant shells and can be used in damper conditions. It is also recommended to keep a sleeping bag in a larger sack (storage sack) as opposed to the small traveling sack (compression bag) during long periods of storage. However, many regular backpackers and hikers agree that hanging a sleeping bag, taking care to move the position of the bag on the hanger at intervals so as to not create a "dead spot" (a spot where the fill has been crushed so that it is no longer useful), is the best method of storing a bag for long durations. Hypothermia is a condition in which an organisms temperature drops below that Required fOr normal metabolism and Bodily functionS. In warm-blooded animals, core [[body Temperature]] is maintained nEar a constant leVel through biologic [[homEostasis]]. But wheN the body iS exposed to cold Its internal mechanismS may be unable...

Other materials, notably cotton and wool, have also been used for sleeping bags. Wool repels water nicely and also resists compression, but it weighs much more than any alternative. Cotton suffers from high water retention and significant weight, but its low cost makes it an attractive option for uses like stationary camping where these drawbacks are of little consequence. For other uses, see Cotton (disambiguation). ... Long and short hair wool at the South Central Family Farm Research Center in Boonesville, Arizona Wool is the fiber derived from the fur of animals and people of the Caprinae family, principally sheep, but the hair of certain species of other mammals such as goats and rabbits and oxes...

Temperature ratings

In Europe, the EN 13537 standard normalizes the temperatures at which a sleeping bag can be used. A test, relying on a heated mannequin, provides four temperatures: Image File history File linksMetadata Download high resolution version (1545x1024, 897 KB) Summary Author: Daniel Maleck Lewy, 2005, all permissions are given. ... Image File history File linksMetadata Download high resolution version (1545x1024, 897 KB) Summary Author: Daniel Maleck Lewy, 2005, all permissions are given. ... For other uses, see Europe (disambiguation). ... EN 13537 (or EN13537) is a European standard designed to standardize the temperature ratings on sleeping bags manufactured and/or sold in Europe. ... Standardization, in the context related to technologies and industries, is the process of establishing a technical standard among competing entities in a market, where this will bring benefits without hurting competition. ... For other uses, see Temperature (disambiguation). ... A wooden mannequin For other uses, see Mannequin (disambiguation). ...

The transition zone, in between the comfort and lower temperature, is usually considered as the best purchase guideline.

Indoor sleeping bags

Indoor sleeping bags, sometimes called slumber bags, are widely available, often for use particularly by children. These are usually not designed to be weatherproof, and are often made of natural fabrics instead of the synthetic fabrics commonly used for outdoor sleeping bags. Children's sleeping bags in particular often feature elaborate, brightly-colored printed designs, such as images of popular media characters. Slumber bags make floor sleeping more comfortable, and are often used for sleepovers, family visits, and other situations where there aren't enough beds for everyone. For other uses, see Sleepover (film). ...

Manufacturers

Coleman Company, Inc. ... HaglÃ¶fs is the largest supplier of outdoor equipment in Scandinavia. ... Kelty (owned by American Recreation Products) is a manufacturer of backpacks, tents, and sleeping bags. ... Lafuma is a French based company that specializes in outdoor equipment, such as backpacks and sleeping bags. ... Mountain Hardwear, founded in 1993, is a California-based company that manufactures outdoor clothing, backpacks, sleeping bags, and tents. ... Snugpak is the tradename of manufacturer Brett Harris Ltd. ... The North Face is an outdoor product company. ... PHD Mountain Software PHD--or Peter Hutchinson Designs--is an outdoor clothing and equipment company. ...

See also

A sleeping bag is a protective bag for a person to sleep in, essentially a blanket that can be closed with a zipper or similar means, and functions as a bed in situations where it is impractical to carry around a full bed. ... An infant sleeping bag is a bag-like garment or covering worn by infants for sleeping. ... // Sleepsacks are a popular type of bondage (BDSM) gear. ... Pertex is a versatile, wind resistant, durable wicking fabric with more breathabilty than waterproof membranes. ...

External links

Categories: Camping equipment | Backpacking For other uses, see Sleep (disambiguation). ... Rapid eye movement (REM) sleep is the normal stage of sleep characterized by rapid movements of the eyes. ... Beta is the frequency range of brain activity above 12 Hz (12 transitions or cycles per second). ... Gamma waves A gamma wave is a pattern of brain waves, associated with perception and consciousness. ... The sleep stages 1 through 4 are collectively referred to as NREM (non-rapid eye movement) sleep. ... Polysomnogram demonstrating SWS. High amplitude EEG is highlighted in red. ... In humans, a theta wave is an electroencephalogram pattern normally produced while awake but relaxed or drowsy. ... A delta wave is a large, slow brain wave associated with deep sleep. ... Sleep deprivation is a general lack of the necessary amount of sleep. ... This article is about the sleeping disorder. ... A parasomnia is any sleep disorder such as sleepwalking, sleepeating, sleep sex, teeth grinding, night terrors, rhythmic movement disorder, REM behaviour disorder, restless leg syndrome, and somniloquy (or sleep talking), characterized by partial arousals during sleep or during transitions between wakefulness and sleep. ... Sleepwalking (also called somnambulism or noctambulism), under the larger category of parasomnias, is a sleep disorder where the sufferer engages in activities that are normally associated with wakefulness while they are asleep or in a sleeplike state. ... This article does not cite any references or sources. ... For other uses, see Night Terror. ... Dyssomnias are a broad classification of sleeping disorder that make it difficult to get to sleep, or to stay sleeping. ... Hypersomnia, also known as excessive daytime sleepiness (EDS), is excessive amount of sleepiness. ... For other uses, see Narcolepsy (disambiguation). ... Sleep apnea, sleep apnoea or sleep apnÅ“a is a sleep disorder characterized by pauses in breathing during sleep. ... Ondines Curse, Congenital Central Hypoventilation Syndrome or primary alveolar hypoventilation, is a respiratory disorder that is fatal if untreated. ... Periodic Limb Movement Disorder (PLMD), also called nocturnal myoclonus, is a sleep disorder where the patient moves involuntarily during sleep. ... Circadian rhythm sleep disorders are a family of sleep disorders affecting the timing of sleep. ... Nocturia is the need to get up during the night in order to urinate, thus interrupting sleep. ... Automatism, from the Greek automatismos or self action, is the spontaneous production of often purposeless verbal or motor behavior without conscious self-control, self-conceptualization or self-censorship. ... Sleeping sickness or African trypanosomiasis is a parasitic disease in people and animals, caused by protozoa of genus Trypanosoma and transmitted by the tsetse fly. ... For other uses, see Dream (disambiguation). ... The current usage of the term nightmare refers to a dream which causes the sleeper a strong unpleasant emotional response. ... Exploding head syndrome is a rare condition first reported by a British physician in 1988[1] that causes the sufferer to occasionally experience a tremendously loud noise as if from within his or her own head, usually described as an explosion or a roar. ... Hypnos and Thanatos,Sleep and His Half-Brother Death by John William Waterhouse Wikibooks has a book on the topic of Lucid dreaming A lucid dream is a dream in which the person is aware that he or she is dreaming while the dream is in progress. ... A false awakening is an event in which someone dreams they have awakened from sleep. ... The Nightmare, by Henry Fuseli (1781) is thought to be one of the classic depictions of sleep paralysis perceived as a demonic visitation. ... Hypnagogia (also spelled hypnogogia) describes vivid dream-like auditory, visual, or tactile sensations, which are often accompanied by sleep paralysis and experienced when falling asleep or waking up. ... A hypnic or hypnagogic jerk is an involuntary muscle twitch (more generally known as myoclonus or a myoclonic twitch) which often occurs during the transition from wakefulness to sleep (see hypnagogia). ... A nocturnal emission is an ejaculation of semen experienced by a male during sleep. ... Somnolence (or drowsiness) is a state of near-sleep, a strong desire for sleep, or sleeping for unusually long periods. ... Bedding refers to the materials laid above the mattress of a bed for warmth. ... Decorative tapestry pillow A pillow is a large cushion support for the head, usually used while sleeping in a bed, or for the body as used on a couch or chair. ... A bed sheet is a large piece of cotton or linen cloth used to cover a mattress. ... A double duvet. ... It has been suggested that Wool blankets be merged into this article or section. ... A quilt is a type of puppy with long fluffy ears. ... Nightwear, also called sleepwear, nightclothes, or nightdress, is clothing designed to be worn while sleeping. ... This article or section does not cite its references or sources. ... A child wearing a blanket sleeper. ... Fashionable young men in early 16th century Germany showed a lot of fine linen in a studied negligence. ... The negligee is a form of womenswear intended for wear at night and in the bedroom or in a airport parking lot. ... Pink chiffon nightie A nightgown (also called a nightdress) is a loosely hanging item of nightwear nowadays solely for women, Its length may vary from hip-length (babydoll) to floor-length (peignoir) but is typically knee-length. ... This article does not cite any references or sources. ... For other uses, see Nightcap (disambiguation). ... A peignoir is a long nightgown for women usually sheer and made of chiffon. ... Look up Pajamas in Wiktionary, the free dictionary. ... Short pink chiffon nightgown Black slip nightgown A nightgown (also called a nightdress) is a loosely hanging item of nightwear nowadays mostly for women. ... Genera & Species Genus Cimex Cimex lectularius Cimex hemipterus () Cimex pilosellus Cimex pipistrella Genus Leptocimex Leptocimex boueti Genus Haematosiphon Haematosiphon inodora Genus Oeciacus Oeciacus hirudinis Oeciacus vicarius Bedbugs (or bed bugs) are small nocturnal insects of the family Cimicidae that live by hematophagy, that is by feeding on the blood of... Many competing theories have been advanced to discover the possible connections between sleep and learning in humans. ... Snoring is the act of breathing through the open mouth in such a way as to cause a vibration of the uvula and soft palate, thus giving rise to a sound which may vary from a soft noise to a loud unpleasant sound. ... Jet lag (or jet-lag) is a physical condition caused by crossing multiple time zones during flight. ... This does not cite its references or sources. ... A power nap (sometimes called a catnap) is a short nap, usually 15-20 minutes, intended to revitalize the subject from drowsiness while working, coined by Cornell University social psychologist James Maas. ... Polyphasic sleep is a term used to describe several alternative sleep patterns intended to reduce sleep time to 2â€“6 hours daily in order to achieve a better quality of sleep. ... A painting of a young woman taking a siesta. ... For other uses, see Sleepover (film). ... Bedtime is a popular parenting tradition that involves, to a greater or lesser extent, rituals made to help children feel more secure [1], and become accustomed to a comparatively more rigid schedule of sleep than they would sometimes prefer. ... Bedtime Stories track listing Sanctuary (9) Bedtime Story (10) Take a Bow (11) GHV2 track listing Dont Cry for Me Argentina (radio edit) (5) Bedtime Story (edit) (6) The Power of Good-Bye (album version) (7) For the 1964 comedy film, see Bedtime Story (film). ... For other uses, see Lullaby (disambiguation). ... A bedroom is a room where people sleep. ... For other uses, see Bed (disambiguation). ... A pillow top queen-size mattress. ... A futon in Japan A futon in the U.S. A futon ) is a type of mattress that makes up a Japanese bed. ... A Bunkbed A bunk bed is a type of bed in which one bed is stacked on top of another. ... A four poster bed is a bed with four posts which support a tester. ... Garden hammock A couple in a hammock on the beach The hammock is a fabric sling used for sleeping or resting. ... Dream worlds are a commonly used plot device in fictional works, most notably in science fiction and fantasy fiction. ...

Contents

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