One tunnel, multiple ways to use it. Watch your cat shuttle through the tunnel back and forth, or your cat can lie down and sleep in the tunnel. The tunnel holds its shape well, there are 2 pieces of support inside, and they effectively prevent the tunnel from losing its shape. The opening at both ends is tall and wide to fit the size of most cats. Put together in a snap, snap buttons are very reliable, and your pet's hair won't get caught in it.