The batting is packed with light and warm polyester (220g / ©O), giving it the warmth to withstand the extreme cold. The lining is 210T nylon, which is soft to the touch, light and has excellent heat retention and quick-drying properties. Comfortable operating temperature of sleeping bag: 3 ¡æ ¡« 10 ¡æ, minimum operating temperature: -3 ¡æ. Useful for camping and the outdoors.The design is removable from the top and bottom, and it has a zipper up to the abdomen, so it can be worn as a jacket as well as a sleeping bag.The humanoid shape allows you to freely put out your limbs, so you don't feel cramped at all! A shrink cord is attached to the hat to prevent chills and keep it warm. You can move your feet freely by opening the zipper at the bottom. It is hygienic because it can be washed in a washing machine. As it comes with a storage bag, it can be stored compactly when not in use and is convenient to carry.This sleeping bag is great for outdoor travel, camping and more.