This is the cat seat that's gently heated to provide felines with a warm, comfortable perch. The cushion has an integrated 6-watt heating element and thermostat that automatically keeps the sleeping surface at 12º F to 15º F above the ambient temperature, yet is not warm to human touch. The seat simply attaches to a window sill with the included brackets and screws, providing a permanent heated window perch for perpetual feline pleasure. The 13 1/2" W x 23" L seat has a 100% soft microfleece cover with a 2"-thick orthopedic foam interior, providing a soft yet supportive surface for elevated cat naps. The seat's removable hood shades cats from the sun while its window allows them to peer outside. Removable cover is machine washable. Plugs into AC. For window sills at least 24" wide.