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Human Sleeping Bags

Sleeping Bags

The first sleeping bags was made by Ajungilak company filled with fiber in 1890. With the development of outdoor and camping, the technology of sleeping bag changes lot.


Now there are fiber and down sleeping bags. Sleeping bag is made up of shell, lining, filling and zipper. From the shape, it can divide into envelop, mummy and mixed sleeping bag.


A basic envelope sleeping bag is simply a square blanket, fitted with a zipper on two or three 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 with cord locks. The basic design works well for most camping needs but is inadequate under more demanding circumstances.

 

Envelope Sleeping Bags Sleeping Bags Sleeping Bag


The second major type of sleeping bag, sometimes called a mummy bag, because of its shape, is different in a number of important ways. It tapers from the head end to the foot end, reducing it’s volume and surface area, and improving its overall heat retention properties. Some bags are designed specially to accommodate women's body shapes. Most mummy bags do not unzip all the way to the feet. The zipper is a weak point in any sleeping bag's insulating qualities. Together with the tapered shape, this design feature helps protect the feet, which are more vulnerable to heat loss than other parts of the body.
 
The mixed sleeping bag is also called half- rectangular which is capacious than mummy sleeping bags and smaller than envelope sleeping bags.