This compact, lightweight emergency blanket packs a tremendous amount of assurance into a small package! It's constructed from the same kind of aluminized polyester material that NASA uses as insulation. This efficient, lightweight blanket resists water and retains up to 90% of your body heat. Great for providing protection in the event of hurricanes, earthquakes, tornados, accidents, and trauma to prevent body heat loss. Can also be used to provide shelter from rain and sun, as well as act as a signal mirror. Unpacked, our blanket will not crack, mildew or shrink, so it's ideal for including in emergency preparedness supplies.