DESC: Features COMFORTSmart technology that's guaranteed to keep you comfortable. COMFORTSmart Includes: ,, ,, ,, Zipplow plows fabric away from zipper to prevent snags,, Fiberlock prevents insulation from shifting, increasing durability,, Thermolock reduces heat loss through zipper,, Zipper Glide tailoring for smooth zipper operation around corners,, Roll Control locks bag in place for easier rolling,, Comfort Cuff surrounds your face with softness,, ,, Super king size bag is wider and fits most people up to 6' 4". Cotton shell and flannel liner, 5 lbs. of Hollofil 808 insulation filler. Wrap 'n' Roll System. 39" x 81". Imported.