(Kane Manufacturing) Now pets can enjoy a warm and cozy bed during cold weather. The KANE Pet Heat Mat is made of high density durable polyethylene. Insulation under the heating element forces heat to mat surface. No heat loss to bottom side - more energy efficient. When mat is placed inside any confined area, a rheostat control must be used. The 300 watt rheostat included, regulates heat mat temperature according to temperature of surrounding environment.