Coghlans Survival Bag Emergency shelter doubles as a ground sheet. Can be used as a distress signal or for storing gear. Also helps prevent hypothermia. Made from 3-mil polyethylene. Size: 84? x 36? (210 x 90 cm) Weight: 9 oz. (255 g) Additional Uses Include: Waste and garbage disposal - Insulation - Gear storage - Tarp and overhead shelter - signaling device - Trail marker - Hot air balloon.