The Alps Mountaineering 20176, Crater Lake rectangular sleeping bag has plenty of foot room for campers who crave comfort. Techloft polyester insulation, made with hollow-core fibers, provides high-lofting warmth. Two-layer offset construction eliminates cold spots. Features soft polyester/cotton lining ripstop nylon shell offers long-lasting durability for years of use. Full-length draft tube keeps warm air in and cold air out full-length zipper allows you to zip multiple bags together. Nylon stuff sack included. Special buy.