Introducing the USGI 4 Piece Modular Sleep System in Woodland Camo, a genuine U. Military Issue suitable for camping and outdoor adventures. Made of Nylon and Goretex material, this sleeping bag is water-resistant and durable. It comes in a regular military issued size, and has a fill material of synthetic fibers. The sleeping bag also features a temperature range from -40 to 50°F, making it suitable for extreme weather conditions. This is a used item. Super clean. Just being honest.. I don’t believe it was ever military field used.