The Sealy Prestige Temperature Balancing Duvet insulates you when you are cold and wicks away moisture when you are warm for the perfect night's sleep. The luxuriously soft, 500-thread count, top layer is made with 100% cotton for ultimate comfort. Adaptive™ advanced wicking technology responds to your body temperature throughout the night so that you are not too hot and not too cold. The Eternaloft™ hypoallergenic fill and the box quilt design ensure that your comforter will maintain is shape and not shift over time.