Sunbeam Heated Mattress Pad | Waterproof, 10 Heat Settings, California King Polyester Cozy heated electric mattress pad has a waterproof backing for peace of mind, and the top is made of 100% cotton, 200 thread count 10-setting controller with 10-hour auto-off; each side can control heat levels individually with 2 heating zones ThermoFine technology senses and adjusts to deliver consistent warmth while you sleep Machine washable and dryer safe 5-year limited warranty