What Is A Sleeping Bag？

A sleeping bag is a bag for sleeping. Most sleeping bags in the market are marked with comfortable temperature and limit temperature. The comfortable temperature is a series of temperatures during the whole night's sleep, with the maximum and minimum. The maximum comfortable temperature refers to the heat felt in the sleeping bag but not a lot of sweat. The general definition is that the zipper of the sleeping bag is opened, the arm is placed outside, and the head of the sleeping bag is not tightened.