Coghlan's Thermal Blanket.Coghlan's Thermal Blanket Product Description Coghlan's Thermal Blanket is a staple item to include in your emergency preparedness kit. Made from heavy gauge reflective aluminum foil with a waterproof polyethylene backing, this versatile windproof blanket is designed to retain body heat. It offers protection from wind and rain in storms and can provide a barrier against cold, wet ground. It can be used for winter camping to protect your sleep system