question: Why is it so comfortable to sleep under a blanket, even when it’s not cold?
comment: Also the slight pressure of something on your body. If you are wrapped up/covered, you are safer in your primitive mind. That why they sell weighted blankets that people can use for anxiety and other disorders. They also have weighted blankets with a cooling system in them for the warmer months/climates to keep you from overheating while still getting the benefits of the blanket
passages: Comforters are usually used in the winter season when it is very cold, although a variety of different thicknesses means that they can be used in other seasons as well, with lighter examples being used in warmer weather. Due to the thickness of a comforter or the amount of down/feathers or other filling it has, a person is insulated against cold.
   Blankets have been used by militaries for many centuries. Most militaries have blankets as compulsory for sleeping quarters in preference to duvets. Militaries are some of the biggest single consumers of woolen blankets. Military blankets tend to be coarse grey with a high level of microns, usually over 20. Suppliers include J. E. Ashworth & Sons and Faribault Woolen Mills who made half of all blankets in America at one time.
   The sleeper serves mainly to keep the wearer warm at night, even in the absence of blankets and bed covers. The sleeper covers the entire body except for the head (except in certain cases where a hood is present) and (in most cases) hands (except in cases where a sleeper has attached mitts, mostly on infant sizes), where it is snug at the neck and wrists. The use of a zipper closure in place of buttons or snap fasteners also further retains warmth by eliminating drafts. This is especially important for infants, for whom loose blankets may pose a safety hazard (including increasing the risk of SIDS), and possibly for older children, who may still be too young to be relied upon to keep their own sleepwear or bed covers adjusted so as to prevent exposure to the air of bare skin. This is reflected in advertisements by blanket sleeper manufacturers, which often emphasize that their garments "can't be kicked off", or that "no other covers are needed". The permanently attached feet can also be a beneficial feature for children who are prone to get out of bed in the morning before their parents are awake, and are too young to be relied upon to put on slippers or other footwear to keep their feet warm, as well as for adults who find putting on, and/or wearing socks in bed too bothersome, yet still want their feet covered when getting out of bed in the morning. Blanket sleepers without feet allow more room for growth and reduce the possibility of slipping. Also, children with larger or smaller feet find a better fit.
   Many types of blanket material, such as wool, are used because they are thicker and have more substantial fabric to them, but cotton can also be used for light blankets. Wool blankets are warmer and also relatively slow to burn compared to cotton. The most common types of blankets are woven acrylic, knitted polyester, mink, cotton, fleece and wool. Blankets also come with exotic crafting and exotic material such as crocheted afghan or a silk covering. The term blanket is often interchanged with comforter, quilt, and duvet, as they all have similar uses.
  
  Section::::Uses.
   Blanket
  
  A blanket is a piece of soft cloth large enough either to cover or to enfold a great portion of the user's body, usually when sleeping or otherwise at rest, thereby trapping radiant bodily heat that otherwise would be lost through convection, and so keeping the body warm. 
  
  Section::::Etymology.
  
  The term arose from the generalization of a specific fabric called Blanket fabric, a heavily napped woolen weave pioneered by Thomas Blanket (Blanquette), a Flemish weaver who lived in Bristol, England, in the 14th century.
   Typically, but not always, the blanket sleeper consists of a loose-fitting, one-piece garment of blanket-like material, enclosing the entire body except for the head and hands. It represents an intermediate step between regular pajamas, and bag-like coverings for infants such as buntings or infant sleeping bags (Terminology and Variations sections below). Like bag-like coverings, the blanket sleeper is designed to be sufficiently warm as to make regular blankets or other bed covers unnecessary, even in colder weather. Unlike such coverings, the blanket sleeper has bifurcated legs to allow unhindered walking (or crawling).
   After the invention of rubber, the classical bed warmer was largely supplanted by the hot water bottle, which is still widely used. In the early 20th century, electric blankets were invented to fulfill the same need. Another modern replacement was the electric bed warmer, containing a lampholder and low wattage incandescent light bulb.
   Earlier usage of the term is possible through its derivation from the French word for white, blanc.
  
  Section::::Types.
   An electric blanket is a blanket with an integrated electrical heating device usually placed above the top bed sheet. The first electric blanket was invented in 1912 by American physician Sidney I. Russell. This earliest form of an electric blanket was an 'underblanket' under the bed that covered and heated from below. In 1937, Electric 'overblankets which lie on top of the sleeping person were introduced in the United States.
  
  1912 Traffic light (electric)
   Some modern electric blankets use carbon fiber elements that are far less bulky and conspicuous than older heating wires. Carbon fiber is also used as the heating element in many high-end heated car seats. Blankets can be purchased with rheostats that regulate the heat by managing body heat and blanket temperatures, ensuring a comfortable experience.
  
  Section::::Safety.
  
  Section::::Safety.:Overheating.
  
  Newer electric blankets have a shutoff mechanism to prevent the blanket from overheating or catching fire. Older blankets (prior to about 2001) may not have a shut-off mechanism; users run the risk of overheating. Older blankets are considered fire hazards.
   Other factors that influence the clothing insulation are posture and activity. Sitting or lying change the thermal insulation due to the compression of air layers in the clothing, but at the same time - depending on the materials that are made of - chairs and bedding can provide considerable insulation. While it is possible to determine the increase of insulation provided by chairs, sleeping or resting situations are more difficult to evaluate unless the individual is completely immobile.
   Electric blankets usually have a control unit that adjusts the amount of heat the blanket produces. Blankets for two-person beds often have separate controls for each side of the bed. The electric blanket may be used to pre-heat the bed before use or to keep the occupant warm while in bed.
  
  Some modern "low voltage" electric blankets have thin carbon fiber wires and work on 12 to 24 volts.
  
  Section::::Mechanism.
   A cartoon electrical blanket with its electrical temperature control acting as an anthropomorphic face named "Blanky" was portrayed in the 1987 film "The Brave Little Toaster".
  
  In the 1951 film "The Thing from Another World", it was a haphazardly thrown electric blanket that melted the block of ice in which the alien monster was encased thus releasing the monster.
  
  Section::::See also.
  
  BULLET::::- Bed warmer
  
  BULLET::::- Heating pad
  
  BULLET::::- Hot water bottle. This is a container which can be filled with hot water in the evening and which can help to keep a bed warm overnight.
  
  Section::::External links.
   Therefore, the longer one stays up the drier and warmer their bodies get and the longer one sleeps the wetter the brain and the body gets and their temperament would drop lower. Actually while one is sleeping the body temperature drops meaning that the heat would move from the surface of the body and that's why one might need a blanket during night. During the day the heat would move to the surface of the body and the body temperature raise.
   Yet another potential benefit of the blanket sleeper is that it may help prevent infants from removing or interfering with their diapers during the night. This can also apply to older children with certain developmental disabilities, such as Angelman syndrome. In particular, parents of Angelman children have been known to take such additional measures as cutting the feet off the sleeper and putting it on backwards, and/or covering the zipper with duct tape. Some specialty locking clothing and other adaptive clothing purveyors offer blanket sleepers, with or without feet, for adults with dementia or other disabilities, for similar reasons.
   While no single feature is universal (see Terminology), distinguishing a blanket sleeper from regular pajamas usually include:
  
  BULLET::::- One-piece construction with long sleeves and legs.
  
  BULLET::::- Attached bootees enclosing the wearer's feet.
  
  BULLET::::- Composition from relatively thick, heavy fabric.
  
  Although any sleeping garment with some or all of these characteristics could be called a "blanket sleeper", the term is most commonly applied to a range of styles that deviate relatively little from the same basic design. (The features of this design are described in the "Features" section, below).
  
  Section::::Features.
  
  Features of the typical blanket sleeper often include:
   An electric blanket is a blanket containing integrated electrical heating wires. There are several types; underblankets, overblankets, throws and duvets. An electric "underblanket" is placed above the mattress and below the bottom bed sheet. This is the most common type in the UK and Commonwealth countries, where it is known by default as an "electric blanket"; in the U.S. and Canada, where it is less common, it is called an electric heated mattress pad. An electric "overblanket" is placed above the top bed sheet, and is the most common type in the U.S. and Canada, where it is called an "electric blanket".
   Blanket sleeper
  
  The blanket sleeper or footie pajama (also known by many other synonyms and trade names) is a type of especially warm sleeping garment worn primarily during the winter in the United States and Canada. The garment is worn especially by young children.
   BULLET::::- Self-fabric feet : Sleepers made in sizes for infants who are too young to walk often omit the slip-resistant soles on the feet, instead having soles made from the same fabric as the rest of the sleeper. This is also occasionally seen on sleepers for older girls or women.
   It has been shown that moisture (either externally, or from sweating) severely decreases the insulating effect of sleeping bags.
  
  Section::::Indoor sleeping bags.
   Shoes, Caps, Shirts, etc." and "…new English Blankets . . . A single one is large enough to cover a double bed and the texture is far superior to the blankets usually brought south with goods."
   The term "security blanket" was popularized in the "Peanuts" comic strip created by Charles M. Schulz, who gave such a blanket to his character Linus van Pelt. Linus called it his "security and happiness blanket", in "Good Grief, More Peanuts" printed in 1956. However, the concept of a comfort blanket existed prior to "Peanuts". In a November 1954 "Review Report" article, writer "Bev" wrote about her daughter: "Security blanket. My younger child is one year old. When she finds a fuzzy blanket or a fleecy coat she presses her cheek against it and sucks her thumb." Since 1920, blankets which clipped onto sleeping infants to prevent them from rolling out of bed and keep the body covered were dubbed "security blanket fasteners".
   A weighted blanket, also known as a gravity blanket, is a blanket filled with heavy pellets. Weighted blankets have been claimed to reduce anxiety and therefore allow the wearer to fall asleep more quickly. Some studies such as one from the Journal of Sleep Medicine & Disorders show that weighted blankets improve sleep quality.
  
  Weighted blankets were first used in 1999, when an occupational therapist, Tina Champagne, used them to help some mental-health patients.
  
  Section::::Use by adults.
   Protection from the ground is an important aspect of emergency survival shelters. This is something that is not provided by a simple poncho shelter. A large percentage of body heat is lost to the ground. Sleeping directly on the ground without a layer of bedding can cause loss of heat. If the ground is wet, this can also pose a problem.
  
  Section::::Issues and hazards.
  
  Several different issues can arise.
  
  Section::::Issues and hazards.:Fire.
   Blanket fort
  
  A blanket fort is a construction commonly made using blankets, bed sheets, pillows, and sofa cushions. It is also known as a couch fort, pillow fort or sheet fort.
  
raw_presuppositions: Blankets are only comfortable because they keep you warm.
raw_corrections: Blankets are also comfortable because they cause a slight pressure on your body.