What is a sleeping bag?

bag? sleeping What

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What is a sleeping bag?
A sleeping bag is a bag for sleeping. Most sleeping bags on the market are marked with comfort temperature and extreme temperature. The comfort temperature is a series of temperatures that the user sleeps throughout the night, with maximum and minimum temperatures. The maximum comfortable temperature refers to the heat that feels hot in the sleeping bag but not a lot of sweat. It is generally defined as the sleeping bag zipper is open, the arms are placed outside, the sleeping bag head is not tightened, etc. The function of the sleeping bag is only to keep the heat lost as little as possible, while the human body in the sleeping bag continuously generates heat to keep warm. The heat generated by different individuals and situations is different. All sleeping bag temperature scale systems are based on a standard. The human body, but such a standard human body basically does not exist. A sleeping human body has about 75-100 watts of thermal power, which is converted to about 47-55 watts per square meter according to the surface area of ??the human body.