No more cold sheets ever again! the Serta plush velour mattress pad warms your sheets before you get into bed for instant comfort. The 100-percent Coral fleece velour fabric provides a silky smooth feel that provides an extra level of luxury and rejuvenates your mattress for a better nights rest. Before you get into bed, simply turn on the programmable digital controller to one of the 10-heat settings to set your desired heat time and temperature and let the Serta preheat technology warm your bed quickly. Do you love a warm bed but Hate to WAKE up hot in the middle of the night? our exclusive timer feature allows you to set the heat time from minutes to 12-hours so you will always be at your own perfect sleep temperature. King size mattress pad measures 78-by-80 Inch and includes two digital controllers and dual zone control for individual comfort. Each controller has a 19-foot power cord for convenient and easy placement. This amazing mattress pad is constructed with built in safety features that include overheat protection and automatic shut off after 10-hours for added Peace of mind. We've constructed a flexible skirt on all four sides to keep the mattress pad in place, promote better sheet fitment and fit mattresses up to Inch deep. Turn down your thermostat and save! a cool room and warm bed will not only help you sleep better; you can save 5 - 15% on your energy bills when you turn your thermostat down 10 - 15 degrees for 8 hours. Comes with a 3-year manufactures warranty. Machine washable.