Marmot Mad River 15 Long Sleeping Bag Sleep Well Out There Cold nights in the backcountry demand a bag you can trust. The Mad River 15 uses 650-fill-power duck down treated with Expe Dry - a permanent, chemical-free process that keeps the down lofting and drying fast even when humidity and condensation move in. The 100% recycled nylon shell and lining hold up to repeated nights out, and the Long size fits sleepers up to 6'6" without cramping the footbox. The draft collar and anatomically designed wrap-around footbox lock in heat where it matters, so you wake up ready to move. Features RDS-certified 650-fill-power duck down with Expe Dry(TM) permanent, chemical-free treatment for quick-drying, loft-retaining warmth in damp conditions100% recycled nylon shell and lining durable, eco-conscious construction rated to 15degF / -9degC (ISO tested)Full-length left-side 2-way anti-snag zipper plus short right-side zipper precise ventilation and easy entry across a range of sleeping temps Anatomically designed wrap-around footbox, draft collar, and internal stash pocket seals heat at the foot, blocks drafts at the shoulder, and keeps small essentials within reach | Marmot | Mad River 15 Long Sleeping Bag | Nylon