Electrowarmth heated mattress pads radiate heat from below allowing you to relax into a deep and restful sleep. Proudly, manufactured in america by electrowarmth since 1939. Many improvements since then but the original "on the mattress" principle has been well proven. On cold winter nights, keeps the chills away with this safe and efficient warming mattress pad. The warming pad provides continual and even bed warmth throughout the night. Provides sleep inducing relaxing heat from below that is so soothing, like soaking in a tub of warm water. This relaxing sensation helps lull you to sleep. Soothes aches and pains. Real relief from arthritis. Fibromyalgia and other body aches. When you use the electrowarmth heated mattress pad you can turn down your home thermostat setting and save on your heating bills. They make great christmas, birthday and anniversary presents your friends will be thanking you for many years to come. To operate, the warming pad is equipped with a comfort control. The comfort control levels increase from lo, 2 to 9, and hi settings. The mattress pad has a quick heat up feature on all settings, it comes on at high for a period of time then drops back to the setting you select, and you dont even see this convenient feature. It also automatically shuts off heat after ten hours for extra safety, user convenience, and power conservation. When you turn the pad back on it comes back on at the last setting so you dont have to change the setting very often. The warming pad is etl approved and one of the benefits of this approval is that the unit shuts off if there is ever an overheat situation. A fitted skirt that wraps all the way around holds the pad in place and accommodates mattresses up to 13 inches thick. Safe for machine washing and drying. Available also in 3 twins, 5 full, 5 queens, 2 olympic queens, 2 kings, and 1 california king sizes. The mattress pad is covered by a limited 1-year warranty with a 30 day money back guarantee.