100% Cotton Heated Mattress Pad. Sleep in warmth and comfort with the Beautyrest 100% Cotton Heated Mattress Pad. Using Secure Comfort Technology, this electric mattress pad features 20 heat settings that provide maximum warmth and comfort as well as a 10-hour shut-off timer for safety. The 100% polyester and hypoallergenic filling offers soft and clean comfort, while fitting mattress up to 21-inches deep. Virtually eliminating magnetic field emissions, this heated mattress pad is machine washable and provides excellent warmth, comfort, and safety through the night. Full sizes come with 1 controller and Queen and King sizes come with 2 controllers. Comes with manufacturer's 5-year warranty. Features: 100% cotton heated mattress pad using Secure Comfort Technology Features 20 heat settings for maximum comfort and warmth, 10-hour auto shut off Virtually eliminates electro magnetic field emissions Mattress pad filling is 100% polyester and hypoallergenic Deep pocket depth up to 21 inches of mattress height Machine washable Controller works with smart home outlets and automatic timers, 1 for Full size, 2 for Queen and King Material: 100% cotton, 250 thread count, 100% polyester fillin Dimensions: King: 78"W x 80"L + 18"D, Cal King: 72"W x 84"L + 18"D Color: White Beautyrest Cotton Deep Pocket Heated Mattress Pad with 20 Heat Settings - King / Cal King