1. Dual function: Double-layer composite donut/circle design, to meet the needs and desires of cats to drill holes to play, can bring unlimited fun to cats, dome concave design allows another cat to rest, two can be used at the same time, do not disturb each other. 2. Felt material: The cat tunnel bed is made of selected felt material, which is wear-resistant, scratch-resistant, and will not get fluffy balls to meet the cat's daily scratching and rubbing nature. A cat bed that can be used in all seasons. 3. Extra large space: Small size diameter 50cm/19.68 inch, inner diameter 18cm/7.08 inch, height 20cm/7.87 inch. Large: diameter 60cm/23.42 inch, inner diameter 19cm/7.48 inch, height 28cm/11.02 inch. Four Seasons universal, removable and washable design. 4. Zipper separation design: You can clean every corner inside the tunnel, so that cats have a clean and comfortable playing environment. The simple assembly method allows us to handle the cats more easily. 5. Gifts for cats: Because of the the circular shape adds novelty and has more places to hide, it will be the best choice to your friend who own cats, small dogs, kittens, rabbits and others small animal. Specification Material: Felt Color: Black, Pink, Blue, Grey Size: Small: Outer diameter: 50 cm, Inner diameter: 18 cm, Height: 20 cm, Large: Outer diameter: 60 cm, Inner diameter: 19 cm, Height: 28 cm Weight: 680 g, 1180 g Package Include: 1 Pet Nest