[Expandable and Foldable Design]The novel and beautiful, intelligent and convenient design makes this dog cat backpack the perfect choice for outdoor exploration and long-distance travel with cats and dogs .With a simple expansion feature, it transforms into a spacious home, doubling the interior space of the expandable dog cat carrier. Your pet will have ample room to move around, relax, like a small kennel and enjoy the journey to the fullest..[Breathable and Visible]There are 4-8 (when expandable or non-expandable) tear-resistant breathable mesh on the front, top and sides of the dog cat backpack, which makes it more ventilated and convenient for you to see your pet inside. The top of the pet backpack can be opened to allow your cat and dog to stick its head out..[Doubling the Interior of the Dog Cat Backpack]Provide your beloved furry companion with unparalleled comfort and space in our expandable dog cat backpack. Tailored to fulfill your pets' every desire, it a spacious 15.8" x 12.2" x 9.5" size (unexpanded) and expands to a generous 15.8" x 12.2" x 21.7".Your pet will have ample room to stretch, relax, and explore, making it perfect for cats, dogs, puppies, and more. Most airlines approve of our pet backpack. Please check with your airline before departure..[Travel Friendly] pet backpack with breathable back panel, padded adjustable shoulder straps and chest buckle for traveling, hiking, walking and outdoor activity, the real travel carrier backpack for cats and dogs..[Premium and Functional]Made of quality polyester and anti-scratch mesh, this expandable dog cat backpack is sturdy and for your pets. 2 side pockets to store pet supplies and garbage bag, and a built-in leash to prevent your pet from running away. It has a separate laptop compartment for iPad or laptop(size up to 15.6 inch). Convenient for going out while also meeting work needs..[Multi-function and Conveniently]With our dog cat travel carrier featuring two ways to using, it can be comfortably worn on your back or carry it. The adjustable top opening lets your pet observe, sniff, and engage with the outside world while ensuring their within the backpack. Enjoy worry- experiences together.Whether you're embarking on outdoor adventures, traveling by train or plane, going camping, or even for medical purposes, stroll, our backpack is the perfect choice for every occasion..[Size Suitability]Due to the fact that the size of our pet carrier backpack needs to meet the airline-approved size, our product is fixed in size. On this basis, we have also considered the comfort experience of pets and designed flexible extension space. Therefore, please note that our pet carrier backpack is suitable for 13lbs(6KG) cats & 11lbs(5KG) small medium puppy dogs. We do not recommend purchasing our product for pets larger than this size, as it will affect your four-legged companions' comfort experience..[Safety Belt Buckles Provide More Security as Pet Car Seat]With your pet's as our top priority, the dog cat backpack includes belt buckles and an built-in leash. These features secure the dog cat backpack as a car seat suitable for the front or back seat of cars, SUVs, trucks and prevent your pet from jumping out and hit by vehicle braking abruptly, allowing them to stay comfortable and secure without distracting the driver..[Ideal for temporary pet refuge during emergencies like fires] Our pet carrier stable and expandable compartments, facilitating easy relocation and temporary sheltering of pets in areas. This pet carrier also has multiple storage pockets, allowing you to carry additional emergency supplies and essential items.