Sunbeam MA7117-030-000 Mattress Pad, Twin X-Large 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 Comfort Set control with 10 heat settings, 10-hour auto-off, preheat Machine washable