Weekly Deal 4 Sunbeam Thermofine Quilted Striped Heated Mattress Pad in Various Sizes starting at $44.95. DealYard SKU: HGSUNBEAM770PARENT. Enjoy a warm night′s sleep with the Sunbeam Quilted electric heated mattress pad. Personalized warmth and quilted comfort combine to deliver a relaxing sleep rience. Fits mattresses up to 18 inches deep. Soft touch 100% polyester fabric. You can even save up to 10 percent a year on your heating bills by turning on your Sunbeam Heated Mattress Pad and setting your thermostat back 10 percent to 15 percent for 8 hours while you′re sleeping. Sunbeam thermofine heat system deliver your desired warmth setting throughout the night, without layers of blankets and heavy comforters.