Movable Ball & Crinkle Paper- Pet tunnel built-in crinkle paper, pets are sensitive to sound, increasing the fun of pet self-amusement and hiding away. A movable ball is hung in the hole to enhance the pet's curiosity and natural instinct. Pet will not feel lonely when you aren't at home. Durable Construction & Rainbow Color ---the cat tube is made with a soft and smooth the polyester material does not pick up hair, fur or dirt. It is durable enough for a long time use. Rainbow-like colors add to the fun of toys. Fold for Easy Storage-The speedy foldable steel frame design use less space. Also makes it easy to retract and store the pet tunnel into the black bag when not in use. Two Vents- Cat tunnel has designed two windows for ventilation, increasing the flexibility of pets to shuttle freely.We can also observe their play inside through the window. It suitable for cats of any body type. Perfect After-Sales-If you have any questions, please feel free to contact us, we will reply to your message within 24 hours. We will serve you until you are satisfied.