60% Cotton 40% Polyester Heated Mattress Pad. Cover your bed with the Beautyrest Heated Mattress Pad using Secure Comfort technology. Designed to virtually eliminate Electromagnetic Field emissions, this heated mattress pad features a 10-hour auto-shut off timer and a 5 setting temperature control to ensure your safety. The soft flexible wires and quilted top provide exceptional comfort, while the fitted skirt perfectly fits up to a 19" mattress. Made from a cotton polyester blend, our heated mattress pad is machine washable for easy care. Twin, Twin XL, and Full sizes have one controller, while Queen, King, and Cal King sizes have two controllers. Includes manufacturer's 5-year warranty. Features: Virtually eliminates electro magnetic field emissions 10 hour auto shut off 5 setting temperature control, controler works Soft flexible wires Machine washable Fits up to a 18" mattress 60% cotton 40% polyester Controller works with smart home outlets and automatic timers, 1 for Twin and Full size, 2 for Queen and King size Material: Top: Cotton Polyester Blend Fabric, Polyester Filling, 15" Knit Skirt Dimensions: Twin XL: 39"W x 80"L + 15"D Color: White Beautyrest Cotton Blend Heated Mattress Pad - Twin XL