Easily upgrade your mattress with this topper. Designed with 3 separate chambers that each offer extra loft and comfort for a great night’s sleep. The top chamber is filled with a layer of cotton to provide a barrier to the natural fill below. Down in the middle chamber delivers additional heat retention for those cold nights while the feather fill in the lower chamber provides loft and support. The 300-thread count cotton cover is a breathable, cozy fabric that will last for seasons to come.