An emergency blanket, also known as a space blanket, is a lightweight, compact sheet made from a thin layer of plastic that reflects body heat. It is designed to help retain warmth in emergency situations, making it a vital tool for outdoor activities, camping, and survival kits. These blankets are often used by first responders to prevent hypothermia in individuals exposed to cold conditions. They are also useful for signaling for help due to their shiny surface, which can reflect light. Emergency blankets are inexpensive, easy to carry, and can be lifesaving in critical situations.