Bundle Monster Cool Weather Camping Sleeping Bag for 3 Seasons (Spring, Summer, Fall) - Blue - Adults Cool weather sleeping bag designed for temperature 32F~+ 46F~ + 59F~ (0C~+8C~+15C~) ThermoLock: Reduces heat loss through the zipper, keeping you warmer. Certified temperature rating independently tested for accuracy. Zipper Glide Tailoring: Allows smooth zipper operation around the corner. ZipPlow: Prevents zipper snags by plowing fabric away from zipper. Fiberlock prevents insulation from shifting to keeping you warm throughout the night. Outer surface material is waterproof. Refined compression bag saves space. Roll Control: Locks bag in place for easier rolling. When unzipped, it can spread out to be used as a quilt (74in x 59in)