Peregrine Saker sleeping bags offer top quality materials, insulation, and features. The ripstop nylon shell is DWR treated to keep moisture out and trap warmth in. A soft nylon liner will keep you comfortable in a wide range of conditions and the continuous fiber Perefill® insulation is durable, compressible, and stays warm in extreme environments. The Saker sleeping bag features durable #5YKK zippers, anti-snag zipper design, and an ergonomic articulated foot box.