Sunbeam Therapeutic Twin Heated Mattress Pad, 200-Thread-Count Cotton, White Cotton Therapeutic heated mattress pad for Twin beds provides continuous low-level heat therapy Targets the heat where you need it most--neck and shoulders, back, or legs Electronic wireless controller with 10-hour auto shut-off and pre-heat option 200-thread-count, 100 percent cotton top; spandex/nylon skirt fits mattresses up to 21 inches deep Machine washable; measures 39 by 75; 3-year warranty