The Thermo Pet Cave by K&H Pet Products is available in both a heated and unheated version. This unique cat bed has a backdoor that can be left unzipped for cats that prefer tunnels. The Pet Cave is designed to offer a cozy place for cats to hide and sleep. The interior is completely covered in soft fleece and also includes a hanging plush toy that can be used for playing and batting around. The outside is covered in soft luxurious polyester. The entire bed is machine washable. MET listed.