Emergency Mylar Thermal Sleeping Bag Blanket - Material and origin: Polyester; Imported. - Premium emergency thermal blanket: Aluminum coating on the Mylar foil reflects radiant heat to slow heat loss and retain up to 90% of body heat. Helps prevent hypothermia and shock in an emergency. - Multipurpose survival bivvy: Waterproof, moisture-proof, UV-proof with high and low temperature resistance. Suitable for outdoor gear for men and women during hiking, camping, backpacking, and mountaineering. Can be used as ground cover, sleeping bag liner, emergency poncho, tent or car sleeping bag blanket, camping tarp, and protection against wind, rain, heat, dirt, and dust. - Full body protection and portability: Size 84 inches by 36 inches (210 cm x 90 cm); weight 3.9 oz. Long enough to cover the full body. Easy to carry and store in backpacks, first aid kits, camping gear, car drawers, or even a pocket. Individually folded and sealed, with excellent water and wind proofing and light blocking. - Survival first aid with whistle: Includes a 120-decibel emergency whistle that can alert rescuers up to about a mile away through wind and trees. An ideal gift for men, fathers, women, wives, family, friends, office, or school. - Use scenarios: 1) Outdoor activities such as hiking, camping, backpacking, or mountaineering to stay warm in sudden cold or storm conditions. 2) Emergency shelter for vehicle breakdowns or disaster situations to shield from wind, rain, and cold. 3) Ground cover, sleeping bag liner, or tarp to create a quick shelter or additional warmth in a campsite.