First-aid Tent Insulation MatOverview: The first aid sleeping bag is made of tin foil paper or tin film. The surface is coated with metal. The inner layer is made of PE plastic film. The inner layer is wrapped around the body to reflect the heat back, so as to keep warm and keep warm. First aid sleeping bags are used under special circumstances, such as sleeping on the streets after an earthquake, or being in outdoor danger. In the absence of any other warm clothing and sleeping