Designed for fast alpine climbs and ultralight thru hikes where every ounce counts, the Mountain Equipment Xero 200 Sleeping Bag is the ideal sleeping bag for demanding, warm weather adventures. With an EN comfort rating 43 degrees, this bag is ideal for mid summer alpine climbs, as well as late spring, summer, and fall backpacking trips. The bag is insulated with high quality 850 fill goose down for exceptional comfort, compressibility, and minimal weight. The Xero line of sleeping bags is Mountain Equipment's lightest line of bags. The Xero 200 features Mountain Equipment's EXL technology, which in short is a stretch stitching that not only improves the loft of the down, but also increases thermal efficiency and the overall comfort of the bag. The hood is composed of seven baffles designed to limit down migration and to reduce heat loss. A substantial neck collar helps to trap heat, while a draft tube runs the full length of the zipper for even more heat retention. The side seams of the bag are located at ground level in order to maximize thermal efficiency. Slanted box wall baffles prevent down migration and ensure excellent insulation. The foot of the bag is composed of four baffles to further maximize the efficiency of the down. The Xero 200 comes with a waterproof roll top compression sack and boasts an impressive trail weight of just 22 ounces in its regular size. The bag also includes a mesh storage sack.