Tribe Provisions Mummy Sleeping Bag - 3 Seasons, 40 Degrees (Black) DURABLE - Made with ripstop nylon which is long-lasting, durable, and easy to clean. COMFORTABLE - Mummy bag shape, with a wider foot. Ripstop nylon retains heat and hollow tube insulation holds its shape and softness. 3-SEASON - Rated to 40 degrees. Hollow tube microfiber polyester insulation for resiliency, longevity, comfort. EXTRA FEATURES - An attached stuff sack folds into a zipper pouch; you will never misplace it. Interior chest pocket keeps your valuables out of the way, yet close at hand. IDEAL SHAPE - Dimensions: 78"x 63"x 41"; stuffed: 16"x 8"x 8"; 2.8 lbs. Mummy bag shape.