Serta | Luxurious Sherpa Plush Heated Electric Mattress Pad with Hypoallergenic Fill (Twin) INCLUDES: (1) Electric heated mattress pad with 10 heat settings MATERIALS: Made from soft and durable 100% plush polyester fabric with built in micro-thin wires for more even heat distribution without the bulkiness. FEATURES: Easy to use programmable digital controller has 10-heat settings and built in timer so you will always be at your own perfect sleep temperature CARE INSTRUCTIONS: Preheat technology warms your bed so you will never climb into cold sheets ever again; Machine washable; 3-year manufacture's warranty; ETL certified DIMENSIONS: Twin - 39"x 75"