Designed to deliver restful sleep in the harshest alpine/polar environments, the Cwm -40° Sleeping Bag takes the guesswork out of unpredictable weather during your overnight adventures.

The waterproof and breathable Pertex® Shield fabric membrane offers protection from Mother Nature’s mood swings, while lofty 800-fill-power-down insulation keeps you warm in plunging temps.

When it’s time to call it a day, give your feet a break in the 11-baffle wrap-around foot box with reinforced lining. Stretch tricot cross-baffle construction controls down shifting and eliminates cold spots. The down-filled draft tube and collar, nautilus 6-baffle hood, and zipper guards limit heat loss in the most extreme conditions.