1- Private Cave2- Premium Felt3- Stable Platform4- Extensible Tunnel Original Cat Tunnel by Aberatail Keep cats busy & physically engaged The cat tunnel is designed to provide a private cave for cats hiding & playing. Combine couple of tunnels into a large tunnel kingdom. To inspire cats curiosity and get closer to the nature, use cat teaser to play with your kitty. It features recyclable felt and L-shape hollow tunnel.Easy to fold it into a shoe box size and save space when not in use. We're sure your kitty will soon love it. Product Features： Provides a perfect hideaway to keep cat active and mentally engaged, stimulate natural instinct. The complete tunnel allows multi-cats playing & running, super sturdy for cat laying without collapsing. There are various combinations if you bought multi-tunnels. Meanwhile, you can use cat teaser or mice toy to play with kitty.