【Expandable Tunnel Design】 This large pet backpack (43"L x 12.6"W x 15"H) features an expandable, breathable mesh tunnel design (31"L x 11"W x 11"H). The expandable design offers your pet more space to play, rest, and improves air circulation, promoting their comfort and reducing anxiety. When not in use, the collapsible design helps save space efficiently. Please do not select a carrier based solely on your pet's weight. For the best fit and comfort, be sure to measure your pet’s length and height and compare them to the carrier dimensions 【Breathable and Comfortable】 The Pawtners soft cat carrier is designed with 4-sided breathable mesh windows, ensuring optimal breathability. Your furry friend will enjoy outdoor time with nature and sunshine without feeling cramped in the backpack. When you open the top mesh window, your pet can interact with the outside world and have more space 【Ergonomic Design】 The widened and padded shoulder straps and back provide support, reducing strain and increasing comfort. This dog travel bag includes chest buckles for additional support, and a comfortable handle for long trips, ensuring your comfort throughout the journey 【Made to Last】 Our backpack is made with a strong iron frame and anti-scratch mesh. You don't have to worry about damage caused by scratching or gnawing. It also comes with a safety leash to prevent escape, ensuring your pet's safety and comfort Note: Each airline sets their own specific requirements, so it is advised to check with your airline of choice Introducing the ultimate solution for pet owners who want to take their furry friends on outdoor adventures: the Cat Backpack Carrier! With this versatile cat carrier backpack, you can now easily bring your pet along wherever you go, without worrying about leaving them behind. This cat carrier backpack is designed to provide comfort and security for your cat or small dog. It features a spacious interior that can accommodate medium-sized cats under 25 pounds or small dogs, allowing them to turn around, stand, and lay down comfortably. The carrier is equipped with soft and cozy padding, ensuring your pet stays comfortable throughout the journey. Crafted with high-quality materials, this cat backpack carrier is enough to withstand regular use and outdoor conditions. Its breathable mesh walls and windows provide excellent ventilation, while the sturdy zippers keep your pet safely inside. The backpack's adjustable padded straps make it comfortable to carry, even on long hikes. Designed to meet airline requirements, this pet carrier is perfect for air travel and other modes of transportation. Its compact size makes it easy to store, while the airline-approved design ensures a smooth and stress-free travel experience for your pet. Not only is the Cat Backpack Carrier functional, but it is also stylish. Available in various colors, you can choose a design that suits your taste and matches your personality. Its sleek and modern design offers a fashionable twist on traditional cat carriers, d rawing attention wherever you go. In addition to being a cat backpack carrier, this product also doubles as a dog backpack carrier, suitable for medium and small dogs. Its flexible and versatile design makes it an ideal choice for pet owners with multiple pets of different sizes. Overall, the Cat Backpack Carrier offers a convenient and safe way to transport your pet while enjoying the great outdoors.