Cat tunnels often look flimsy and breakable. Some of them probably are! However, many (like the ones we recommend in this article) are designed using durable fabrics like polyester and nylon that are meant to stand up to your kitty’s claws. Over time, you may notice some wear and tear, but if you’re really worried about ripping, opt for a cat tunnel made from a thicker fleece, fake fur, or other soft woven material.