20D Polyester Tafetta Liner, 20D Ripstop Polyester Shell, 650 Fill Power DriDown Insulation Patent pending zipperless design provides an ultra-comfortable lightweight bag Oversized integrated comforter gives all the comforts of your bed at home Full-length, insulated hand/arm pockets help to seal out drafts and seal in warmth Patented self-sealing foot vent provides fast and easy ventilation Stretch cord closure system helps to seal out drafts SLEEP IN THE BACKCOUNTRY WITH ALL THE COMFORTS OF HOME. The award-winning BCB features a new contoured shape & updated materials to create a more thermally-efficient backcountry experience...all at a lower weight. The Backcountry Bed features a sleeping pad sleeve keeps pad under you for comfort and warmth, and replaces unnecessary bottom insulation.