Western Mountaineering's Badger MF 15 Degree Down Badger Sleeping Bag has more room in the shoulders and hips than traditional mummy bags, so you can move around while you sleep. Ideal for spring, summer, fall, and even winters in the desert, the Badger's 850 down insulation has the loftiest fill rating, resulting in the highest warmth to weight ratio available on the market. Unlike most water resistant shells, Western Mountaineering's MicroLite XP fabric offers long lasting weather protection. The MicroLite XP shell helps the down retain its lofty warmth in moisture riddled environments. Western Mountaineering's critical thought to the smallest details makes the Badger a long lasting and very versatile choice. A differential cut places more fabric at the lining to ensure maximum loft inside the bag, and continuous baffles allow you to shift the bag's down towards the top or bottom for more or less warmth. Hook and loop tabs let you pull the hood, draft tube, and draft collar farther or closer to you for customized coverage. Extra convenient features include zippers on either side, a waterproofed stuff sack, and a storage sack with a large volume that helps the bag retain its loft overtime.