Winter Sleeping Bag
Big Agnes Storm King 0
$380, 3 lbs. 9 oz. (regular)
Sizes: regular and long ($400)
moosejaw.com
When is a mummy-style bag too constricting? I’ve used ultralight, three-season bags that felt a little too coffin-like. But in winter—or wintry conditions, such as you encounter when mountaineering in spring and summer—there are more practical reasons to use a bag with extra space, and you get it with the Storm King 0. Beyond its dimensions, the Storm King’s water-resistant down feathers, fairly unique “system” design that requires sliding an air mattress into a sleeve on the bag’s bottom side, and its relatively affordable price for this category of bags merits a close look.