The MSR 5 ft. indoor/outdoor steel spring frame cat tunnel is a great way to give your cat or small dog a safe place to hide when you’re not around. The steel spring frame provides a sturdy and durable enclosure that can be easily disassembled and reassembled again and again. The mesh door provides a breathable and comfortable environment for your pet while the ground stakes provide added security. The carry case makes it easy to take the tunnel anywhere with you on the go.