When you're battling brutal conditions in the alpine, you'll be psyched to crawl into your NEMO Equipment Canon -40 Down Sleeping Bag at the end of each day. This toasty bag keeps you comfortable on long winter expeditions, with a cozy tunnel hood that's better than a hug from your mother. The DWR-treated shell and lining fights off moisture to preserve the insulating power of the 850-fill down, while Thermo Gills on either side allow easy ventilation when you want it. The center zipper allows easy in and out, and the draft tube seals out frosty drafts when the winds pick up.