Kelty Forecast 40-Degree Climashield Green Sleeping Bag 40 F/4 C Mummy Insulation: Climashield Green Shell Material: PRD315T Recycled polyester dobby Liner Material: RP282T Recycled polyester taffeta Quilt-through construction and efficient form fitting hood Hip-length, two-way zipper and zippered foot vent External snal loops allow bag to function as a liner