With plenty of room and a hood just in case, the semirectangular Western Mountaineering Sycamore MF is made with 1.2 ounce MicroLite XP to provide that extra margin in weather protection. Filled with 17 ounces of our high lofting down, this bag with 5 inches of loft is rated to 25 degrees F. It sports 62 inches of girth at the shoulder and 46 iches at the foot. Not only will it zip to other Western Mountaineering mummy bags, but the zipper around the foot section lets it open up flat to be used as a comforter. This is the river runners dream! This bag was formerly known as the Hooded Aspen MF. Nothing about the bag has changed except its name.