Sleeping Bag. Outer fabric is black lightweight nylon. Filled with 'Insufil', a 'siliconised hollowfiber'. The synthetic fibers are structered to trap warm air between tiny cavities in the fiber. When unpacked the 'Hollowfibers' decompress and spring back to gain maximum re-loft. Inner lining is 'Supersoft', a silky smooth Nylon fabric. The latest yarn technology has been specially woven to produce a highly durable and comfortable lining. Packs to 16" x 8". Temperature rating: Comfort 32 degrees, Low 18 degrees. Weighs 56 oz. Snugpak products are currently in use with the British, USA and Australian Armed Forces.