The K&H Thermo-Kitty Mat is an affordable heated cat bed with a dual thermostat heater buried beneath soft foam to make a comfortable napping place for cats. The surface temperature of the K&H Thermo-Kitty Mat will remain 10-15 degrees above ambient air temperature when not in use by the pet. The product is designed such that the surface will ONLY warm to full temperature when the pet is on the heated cat mat. (See testing image provided)This heated cat bed is extremely versatile and can be used alone or placed on top of your cat's existing favorite cat bed to keep them warm. No matter where you place it, kitty will be thankful that you care enough to give them the very best in heated cat beds. Removable heater measures 5.5" x 20" and is designed to warm the core of your pet and their own circulation system will carry that warmth throughout their body keeping them warm in cold weather or air conditioned homes.