While comfort technology has come a long way from bed warming pans filled with hot coals, ordinary electric blankets with their hard, bulky wires and clicking noises can be not only annoying but pose safety concerns, too. But now thanks to SoftHeat, the world's first UL-listed low-voltage heated mattress pad, you can crawl into a cozy bed and lower those home-heating costs that threaten to go through the snow-covered roof! Using Safe & Warm™ technology that changes 120-volt AC current into safe, low-voltage DC current, the SoftHeat provides overall even warmth via thin, dispersed elements that are so fine they're virtually undetectable. The skirt fits mattresses up to 15" thick, and a controller (two for queen and king sizes) automatically shuts off after 10 hours. Luxuriously smooth, 233-thread-count satin-stripe fabric of polyester/cotton; machine wash and dry