The sherpa mattress pad uses Secure Comfort technology, which is designed to virtually eliminate electromagnetic field emissions. The soft flexible wires, quilted top, and cozy sherpa fabric ensure your comfort. The heated mattress pad is machine washable, with a 10-hour auto shut off and a 5-setting temperature control. Twin and Full size have one controller, Queen and King size have 2 controllers. Includes manufacturer’s 5-year warranty. Fits up to a 17" mattress Twin: 39x75+15" Full: 54x75+15" Queen: 60x80+15" King: 78x80+15" Cal King: 72x84+15"