Designed for warm weather conditions, the Latitude 40°F / 4°C will ensure a solid night's rest. Off-set construction will mitigate cold spots, while the hood can either be laid flat for increased ventilation or contoured to increase warmth as the mercury drops. 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. 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.