Big Agnes Women's Sunbeam 0°

The Big Agnes Women's Sunbeam 0° is the coldest-rated bag in the Sunbeam line, using 100% recycled FireLine ECO synthetic insulation to reach a manufacturer-rated comfort temperature of -18°C (0°F) and a 4-season winter classification. At 1782 g total weight with 1372 g of fill, it is substantially heavier than its 15° and 30° siblings — an expected trade for that much added warmth from synthetic fill rather than down. Unlike the rest of the Sunbeam range, it is built in a rectangular rather than mummy shape, and notably ships without a stuff sack or storage sack, both signals that this bag is meant for basecamp and cold-weather car camping rather than being carried deep into the backcountry. A two-way, full-length zipper, fitted contoured hood, draft collar and draft tube, plus the integrated Flex Pad Sleeve to keep you centered on a pad, round out the cold-weather feature set. For anyone who needs genuine 0°F warmth without the cost or care requirements of down, and who isn't hauling the bag far, this is a straightforward winter option.