Just because it's cold outside doesn't mean that you have to stay indoors! The Latitude -20oF / -29oC has an integrated draft tube and collar to mitigate heat loss and keep you toasty warm. The hood can either be contoured to keep warmth in or laid flat to let heat escape. Two-layer, off-set construction and differential cut prevents cold spots. Flip-over hood allows user to flip the hood inside-out for the option of a flat or contoured hood. Draft collar prevents heat loss from neck and shoulder area. Anti-snag zipper protection. Draft tube along zipper keeps out cold air and prevents heat loss. Trapezoidal footbox provides space so feet remain in a natural position for increased comfort. Stuff sack included. Materials: (Insulation) Slumberloft Synthetic Insulation; (Shell Fabric) Polyester Taffeta; (Liner Fabric) Polyester Taffeta.