Sunbeam Royal Warmth Twin XL Heated Mattress Pad 5-Inch longer than standard twin size heated mattress pads to fit a dorm size bed Thermofine warming system adjusts for consistent heat 100-Percent polyester, 10 heat settings, 10 hour auto-off, preheat Comfortset control with 10 heat settings, 10 hour auto-off, preheat Machine washable