DESC: Durable, lightweight ripstop nylon shell and liner compresses great, and has an extremely soft cushion. All bags can zip up side by side with one another. Insulated draft tube runs the full length of zipper to eliminate heat loss through zipper. Includes a free compression sack. Features include outer shell: waterproof breathable nylon ripstop-Tan, Lining: waterproof breathable nylon ripstop-Brown Plaid, Filling: Micro-fiber-2 layer offset. Note: All Back Pine sleeping bags can be machine washed however, they need to be washed in a horizontal industrial machine that does not have a middle spindle. If you try to wash them in your washing machine at home, chances are they can rip or tear. The manufacturer's warranty does not cover damage caused by improper washing.