¡¾High Quality Materials & Mute Design¡¿Cat Exercise Wheel is made of carefully selected solid wood multi-layer craft board, the Cat Treadmill is very durable, made of wood, and the large and sturdy rotating wheel is enough to provide space for running. The Cat Running Wheel lower shaft adopts the mute pulley design, can effectively prevent noise. When your cat is exercising, you can still listen to music quietly by the side.