The S.O.L. (Survive Outdoors Longer) thermal bivy reflects up to 80% of radiated body heat to help keep you warm and dry in emergency survival situations. Keep one at home, in your car, and a couple in your camping and hiking backpacks. Non-woven fabric is both windproof and waterproof. Also makes a nice, lightweight alternative to covering with your sleeping bag when temperatures are above 50°F. Measures: 36" x 84". Weight: 8.1 oz.