Sunbeam Premium Quilted Cotton Heated Electric Mattress Pad - Twin Size Cotton Sunbeam, America's #1 Heated Mattress Pad! Save up to 10% a year on your heating bills by turning on your heated mattress pad and setting your thermostat back by 10%-15% Control with Personalized Heat Settings and Auto-Off Feature, single for Twin and Full Sizes, dual for Queen and King 100% Quilted Cotton Top, 100% Polyester Bottom Fits Matresses up to 21 inches deep Includes Limited Manufacturer's Warranty from Sunbeam