It was produced by printing heating material between two fireproof material. It heats at constant temperature mainly through far-infrated-ray. it is soft and flexible and can be bended. It can be designed different specifications, according to customers' requirement. They were produced by using our far-infrared carton heating film in it. They heat by emitting far-infrated rays which have very good fuction of treatment. Hotstone's eated pad is a simple, affordable way to keep your pet comfortable indoors or out. it is great for comfortable homes.