The North Face Aleutian BX

A campground favorite, this classic mummy bag keeps campers warm in temperatures down to 20F.

The North Face Aleutian BX pairs overlapping shingle construction with Heatshield Optimal Technology to keep you toasty warm without breaking the bank. Ideally suited for cold damp weather, the Aleutian delivers everything you would expect from a 20°F mummy sleeping bag named after a chain of Alaskan volcanic islands. An ergonomically designed foot box gives your feet a little extra wiggle room and a full-length draft tube keeps the cold from sneaking in. On colder nights, cinch the hood and chest draw cord for maximum insulation. Made with a silky taffeta shell and liner, this smooth bag is insulated with thermally efficient synthetic insulation that won't lose its warmth or loftiness when compressed and shoved into a daypack.

H.O.T. SL Insulation: Built with 100 percent polyester hollow-core fibers, H.O.T. SL provides powerful thermal efficiency. Because the fibers are of variable thickness, they compress easily, without breaking down, resulting in a bag that’s convenient to pack, yet doesn’t lose its softness, warmth, or high-loft.