The mattress protector may help you stay in the deeper stages of sleep longer. Active Cooling protector wicks away moisture, helping you stay cool and dry, so you toss and turn less and get more deep, restful sleep. The exceptionally strong polyurethane membrane is waterproof and provides unparalleled protection from stains. This superior Active Cooling mattress protector provides advanced cooling and comfort with features like elastic side walls, hypoallergenic materials, flexibility, breathable, and ease to wash and dry.