Insulated with lightweight hollow core fiber, the WFS MD-4004 sleeping bag provides a comfort rating to 30 degrees, lightweight and comfortable for summer nights. With soft cotton flannel lining, this sleeping bag is your go-to for warm breezy nights under the stars or cool nights cozy in your cabin. The bag unzips fully to be used as a comforter, and can be zipped together with another bag. Comes with a compression bag for easy compact travel.