Envelope shaped sleeping bag: This type of sleeping bag is mostly used for outdoor camping in warm conditions, because the original intention of this sleeping bag design is to maximize people's comfort requirements for outdoor camping, which inevitably leads to more heat loss. This sleeping bag can generally be zippered open and used as a cushion. Envelope style is a relatively traditional and commonly used sleeping bag construction.
Advantages: Its rectangular shape makes the activity space during sleep more free and relaxed, making it more comfortable to sleep. Additionally, two sleeping bags can be spliced together to form a large sleeping bag.
Disadvantages: Due to the fact that this design is not close to the body, it is also not conducive to heat storage; Not only is its insulation performance average, but for most people, its size and weight may appear too large. Applicable occasions: If you only go camping in the summer and autumn seasons, or do not plan to carry it for long distances, you can choose an envelope style sleeping bag.
