The Original SPACE Emergency Bag reflects and retains over 90% radiated body heat for maximum sedentary protection. Use as full body coverage when at rest, inside a sleeping bag, over a sleeping bag to keep out moisture, or in a true emergency situation. When folded it is approximately the size of a billfold, but opens to (36"x84") 7'x3' bag.Retains over 90% radiated body heat for maximum sedentary protection. Use inside sleeping bag, over sleeping bag or alone. Waterproof/windproof. Flexible to -40 F. Metalized polyester. Size 36"x84". Weight 4 oz.