Carefully designed four layers of design, can be used repeatedly in a first aid bag Light weight, easy to carry, suitable for camping, home and other different places A multifunction sleeping bag with wind proof, water proof, thermal insulation and so on. Material: 4 layers of composite material. The first layer: PE material; the second layer: aluminum film; the third layer: PE; the fourth layer: non-woven Purpose: the effect of heat insulation, but also do the use of sleeping bags