The North Face

Aleutian Bx Sleeping Bag: 20-Degree Heatshield

The North Face Aleutian Bx Sleeping Bag retains heat like you’d expect a bag named for Alaskan volcanic islands would. The North Face used an overlapping shingle construction that, paired with Heatshield Optimal Technology SL (durable, lightweight synthetic insulation), helps you stay warm as lava in cold, damp weather. The North Face gave this 20-degree bag’s hood a zipper, so you can cover your face against a cold wind and vent when you get hot. The ergonomically designed footbox gives your feet some wiggle room, and an external shoulder-level pocket holds your thermometer so you can see exactly how cold the world is outside your toasty Aleutian Bx bag.