Sleeping bag or warm blanket? Smaller cut, breathable, rectangular-shaped 4-season synthetic sleeping bag made with environmentally friendly bluesign certified materials. This rectangular shaped sleeping bag lets you easily couple two bags to provide the optimal temperature you require. The Sensofiber micro-fiber fill reflects body heat yet efficiently transfers moisture away from the body and so maintains a wonderfully comfortable sleeping climate. As all synthetic fibers, Sensofiber warms even when damp, is quick drying, easy to maintain and long-lasting. The Navajo 900 is a small pack sized, warm outdoor sleeping bag for camping and cabin tours in warmer regions.