This is a genuine U.S. Army Modular Sleeping system which is one of the best found anywhere in the world and it's rated to up to -50 degrees!! This Genuine U.S. Army Modular Sleeping System is constructed to insulate the user in environments ranging from mild weather to extremely cold weather. It includes 4 brand new items, a green patrol bag, the black intermediate cold weather bag, a woodland camo bivy cover, and a stuff sack. These two mummy style sleeping bags can be used independently or together in colder environments. The patrol bag is rated at 30 degrees, the black intermediate cold weather bag is rated to -10 degrees and both bags can be used with the vapor permeable bivy cover. When all three components are used together (patrol bag, cold weather bag and bivy cover,) it is rated at -10 degrees and if combined with various insulating layers of the extended cold weather clothing system, it is rated to -50 degrees. Each bag is constructed of water resistant rip-stop nylon and is machine washable and non-flammable. The Woodland Camo Bivy Cover is made of durably waterproof and windproof 3-layer GORE-TEX fabric and includes snap fastener and slide fastener. This modular sleep system features an anatomically designed foot box contains twice the insulation as the bag Sewn-in, quilted chest collar prevents air drafts up and down through the hood. It has a reversible double-pull (opens end to end) slider allows top or bottom ventilation Non-locking slide fastener self repairs if jammed or snagged. It is free from cold spots and the snaps prevent the insulation from migrating in the bag. The draft flap prevents heat loss and the hood adjusts for heat retention (includes a nylon draw cord and barrel lock.)