ULTRA LIGHTWEIGHT COMPACT: The thermal sleeping bag is kept in a small 3.9*5.1-inch bag and weighs only 4.2 ounces. Let you repeat use at any time, you can carry and can be stored in any place, store it in your car, backpack, and emergency first-aid case, etc. It can be easy to find when you have an emergency sleeping bag, and Mezonn emergency heat-resistant Mylar bag is perfect for all emergencies. STAY WARM OVER 24 HOURS: Made out of ultra-lightweight PE material which reflects 90% of your body's heat to you reflective, and its orange color makes it easy for rescuers to find you（And its green color is not easy to see）, making it an essential survival tool, Suitable for outdoor camping and hunting, emergency shelter or car emergency kit. INCREDIBLY DURABLE: The weight of this sleeping bag and the ultra-thin thickness of 28UM make it surprisingly strong. The material ensures a tear-resistant, windproof and waterproof sleeping bag. Besides, this emergency bivvy bag has reinforced tape seams that create a weather-resistant barrier between you and the cold. BIG SIZE: 37 * 80.7 inches is enough to wrap an adult's body, you can also use it as an emergency blanket for two adults in an emergency. It can also perform other functions, such as emergency blankets, awnings, emergency sleeping bags, floor mats, rescue or distress beacons, ponchos, awnings or sunshades.