The Tempur-ProAlign Medium mattress by Tempur-Pedic features an Easy Refresh top cover that is removable, machine washable and has moisture wicking fibers that will draw the moisture away from the body, a layer of Tempur® comfort that automatically responds to your body temperature, weight and shape for truly personalized comfort and support, the Tempur-APR™ support layer made for deeper, more rejuvenating sleep, and the base layer that serves as the support core for the Tempur® layers and helps disperse the heat from the mattress.