As a campground favorite, The North Face Aleutian Bx 20F Degree Synthetic Sleeping Bag keeps you warm down to 20 degrees. This bag is made with a taffeta shell and liner, and filled with Heatshield Optimal Technology (H.O.T. SL) synthetic insulation. The North Face Aleutian Bx Sleeping Bag has a full-length draft tube, easy pull zippers, and shoulder pocket for small items. Durable, packable, and light on the wallet, this is an ideal bag for warmer adventures. Size Shape Rating Fill Inside Girth (shoulder/ hip/foot) Fill Weight Total Weight 6'0 Mummy 20 o H.O.T SL 62/58/40 2 lb 1 oz. 3 lb. 6 oz. 6'6 Mummy 20 o H.O.T SL 64/60/40 2 lb 3 oz. 3 lb. 10 oz.