The NAR Survival Blanket is a small, lightweight solution to keep you dry and warm. Totally waterproof and weighing in under 2 oz, these blankets use technology originally designed by NASA to trap and reflect radiant body heat back towards your body. This reflected body heat can keep the user warm and prevent further body heat loss. The survival blanket is the perfect addition for anyone putting together a survival kit, a 72-hour emergency kit, or simple first aid kit for the car as the versatility of the blanket allows it to keep you warm in a wide variety of conditions.