Three Side Openings : The Cat Tunnel is designed with 3 openings on three different sides and has bells inside. You can set different games with different openings to attract the cats' attention. In this way, your cats will have much fun and enjoy playing with the Cat Cube..Foldable Design : The Cat Tunnel is lightweight to carry and move. Besides, it is foldable. When your cats do not play with it, you can fold it up and store it anywhere so that it will not take up too much space..Proper Size for Cats : The Cat Tunnel has a proper size for cats, kittens, and small dogs, etc. The size is about 4040cm / 15.7515.75 inches, and the diameter of each opening is about 19cm / 7.48inches..Convenient to Clean : The Cat Tunnel is made of high-quality polyester fabric, making it easy to wash with a damp rag or water. The high qualityy also ensures durability for long-time use and for cats' playing..