If you have an indoor cat then it's best to use a cat tunnel that has been specifically designed for outdoor use. Look out for tunnels that can be zipped up at each end to prevent your cat from escaping and mesh fabric so they can see the world outside. It's always best to use a cat tunnel in an enclosed space in case your cat manages to set themselves free. Outdoor cat runs are often different from indoor cat tunnels, so please make sure you buy the right type to suit your cat's needs.\r