This cat tunnel gives your cats a mysterious field where they can do sports and have fun. Additionally, made of durable polyester, it’s suitable for both indoor and outdoor use. Durable material: Polyester is a synthetic material known for its UV resistance and its tensile strength. Polyester is water-resistant, making it the ideal choice for humid or rainy conditions and easy to clean.Sturdy frame: The kitten tunnel is supported by a sturdy and durable steel frame. So don't worry about deformations.Peephole: The interactive cat toy has a peephole at the top, which allows your pet to enter or exit freely, stick its head out to observe the outside, or give you a surprise attack.Fascinating playing space: The tunnel features built-in crackling paper, producing a fascinating sound when cats step on it. Additionally, a hanging ball at one entrance can pique your pet’s curiosity and excite it.S-type tunnel: The S-type can increase the puzzle better than the straight type, providing a better playing experience for your cat.Suitable for many animals: Not just cats, the cat tunnel toy is also suitable for other small pets such as puppies, rabbits, hamsters, and ferrets.Easy to store: The foldable kitten tunnel can be easily folded with an elastic band in seconds and stored in the included carry bag when not in use.