Small/medium size pets only! 🐾 Unique Tunnel: Design with a 50 cm pop-up cat play tunnel, gives fun games and an enticing hiding spot for kitty. Made of tear-resistant steel wire and mesh fabric, can keep firm when cats playing, won't collapse like other tunnels, cats would love hiding and napping inside it! Easy to use with 3 horn buckles, just pop it open and easily fold it down when not use. Great for indoor & outdoor, gives your feline all the fun and feels of spending the day as a furry cave explorer. 🐾 Multi Entrance & Excellent Ventilation: Breathable mesh on top and three sides ensure circulation of air inside; while the zippered design offers 3 entrances for pets easy to access the bag. Your pet friends can observe around through the mesh, stick their head out of the top opening for a great view, reducing their anxiety and feeling more comfortable. 🐾 Sturdy & Safe & Comfortable: Design with 2 steel rings on two sides + 2 steel rods on the top, give the bag a sturdy frame, won't collapse easily, keep pets safe & stable in the bag when moving. A 3-layer liner pad with fabric brings better comfortability. 🐾 Smart Design: ①Built-in Safety Belt with Metal Buckle, effectively prevents pets from escaping. ②Metal Zipper Head, firm and durable and can be used with confidence. ③Storage Function, 2 pockets in the side can hold tissues, foldable bowls, garbage bags and other essentials. ④Interactive Plush Ball, effectively attracts cats to hide, chase, pounce, keeps your furry friends active and entertained. 🐾 Easy to Carry: With the airline-approved design, fits for under-seat dimensions of most airlines. Pecute cat collapsible carrier features a padded carrying strap and adjustable non-slip shoulder strap so you can travel in style and comfort. Backstrap can fasten the pet carrier to your luggage. It fits for small and medium pets measures 17.5"L X 11"W X 11"H, within 16 lbs. It is better to reference your pet's length and height when choosing the carrier