Crinkly crackly fun for everyone. The 23" long Crinkle Tunnel encourages exploration and tunneling activity. Made of durable cotton and polyester material. Attach to other crinkle tunnels and Fuzz-E-Funnels for even more fun. Encourages healthy play and exercise. Additionally the "Hide and Peek" opening in the center of the tunnel is fun for both pets and pet parents. Expandable tunnels stretches to 23" long and features a crinkle material between the fabric layers that creates a unique sound experience|Connectable to other Crinkle Tunnels and Fuzz-E-Funnels|6-Inch diameter tunnel is great for ferrrets, chinchillas, dwarf rabbits and other small animal friends|Durable poly cotton material will withstand multiple washings|Machine washable on gentle cycle and tumble dry on low heat