Ideal for summer nights, the Kelty Cosmic 40 Degree Down Sleeping Bag, from the Kelty Trail Series, offers incredible value in a bag loaded with features. The low weight and compressibility means you'll be comfortable with this bag, whether you're carrying it or sleeping in it. Mummy shape for increased thermal efficiency. 550 fill power down, for lightweight, compressible warmth. 50D polyester taffeta shell and lining. Quilt through construction. Efficient, form fitting hood. 58 dual slider locking zipper. Zipper draft tube with anti snag design. Internal liner loops. Sleeping pad security loops. Hang loops for storage. Ground level side seams and differential cut for maximum warmth. FatMan and Ribbon drawcords. Captured cordlock. Stuff sack included. Available in regular and long lengths, right zip only.