Unique sizes available to fit all bed sizes, Convienint it's out of sight, out of the way until needed, When you get cool while sleeping under just a sheet, reach over and turn on the heated mattress pad, Made like a fitted mattress pad and goes under you right on the mattress, Much better principal than an electric blanket which goes on top, Single and dual controls, with 10 heat setting available with a quick heat up feature, so two people sleeping in the bed can regulate their own heat setting, Save energy cost turn down your home thermostat which pays for the heated mattress pad over and over again, Sleep better in a cool room with warmth from your heated mattress pad, Pre-warms bed. Drives out dampness, Time Tested. Made since 1939. Many improvements since then but the original "on the mattress" principle has been well proven. Highest quality construction for durability, On guard, year round.30 day money back guarantee, machine washable, make great Christmas, birthday and anniversary presents. They dry the bedding and protect the user from becoming chilled at night, on a year-round basis. The ElectroWarmth® bedwarmer, which goes directly on the mattress, provides year round protection from becoming chilled while you sleep. Many electric blankets are fully automatic, but their usefulness is quite limited because they are too heavy (double blankets with wire inside) for mild weather use. Automatic ten hour shut off.