The Nextpro Cat Tunnel is made of sturdy nylon and steel for durability and scratch resistance. It features two separate compartments with openings on both ends and two smaller openings on the sides. The cats love to chase each other through it, take their toys and hide them in the tunnel, use the tunnel as their personal hideout and even nap in the tunnel. It’s easy to use and store, and comes with a bag to store it if not used.