Engineered to reflect and retain over 80% of radiated body heat. the unique combination of vacuum deposited metal and a polyester film surface allows no wind or moisture penetration. when folded, it is approximately the size of a deck of cards, but opens into a 56”x84” blanket. the original space brand blanket has been made in the usa for over 40 years. store in car, camper, boat, or gear bag in case of emergency, or use after marathons, or sporting events. available in silver/silver for general outdoor protection, silver/orange for greater air-to-ground visibility especially against snow or water backgrounds, or olive-drab/silver for tactical situations requiring a thermal emergency blanket that blends in to surroundings. waterproof & windproof, size 1”x4” folded; unfolds to 56”x84” and weighs only 3 oz. available in silver/silver, gold/silver & tactical olive-drab/silver colors.