The UltraLite Sleeping Bag is a 20F down mummy bag designed for backpacking and mountain camping. It weighs under two pounds across all three length options. The 850-fill down provides excellent loft and warmth while compressing to a 7 x 13 inch package. The ExtremeLite shell offers breathability and durability. The nylon taffeta lining is soft for comfort. It includes a down-filled collar and interlocking draft tubes to retain warmth. Available in three lengths for users up to 6ft 6in tall.