Features of The North Face Inferno 0F / -18C Sleeping Bag Full draft collar and integrated draft overlap for comfort and to prevent heat loss Water-resistant NeoVent Air(TM) fabric on hood, footbox and back Trapezoidal side baffles prevent down migration Center zipper for easier access Internal pocket for insulated storage Hood cinch-cord seals out the cold Fitted hood for more warmth and comfort Anti-compression pads for better clo values Vaulted footbox Compression sack and storage sack included Generous cut allows you to wear more layers or to in. maytagin. in the bag Fabric Details Shell top: 15D nylon mini-ripstop Shell bottom: 15D nylon ripstop with NeoVent Air(TM) Liner: 30D nylon taffeta Insulation: 800 fill ProDown(TM) certified to the Responsible Down Standard (RDS) by Control Union