Lekesky Cat Backpack Expandable Dog Carrier Backpack Airline Approved Pet Backpack Carrier for Cats, Small Dogs, Puppies. Collapsible and Expandable: The cat backpack carrier with an expandable back that gives your pet more room to move around and reduces their anxiety. Collapsible design helps you to save space when not in use Breathable and Visible: There are 4-7 (when expandable or non-expandable) tear-resistant breathable mesh on the front, top and sides of the cat backpack, which makes it more ventilated and convenient for you to see your pet inside. The top of the dog backpack can be opened to allow your cat​/​dog to stick its head out Larger Size than Any Others: Expanded size: 21.7" x 13 x 15 inch, unexpanded size: 13'' x 9.8'' x 15'. Fits the pets under 15 lbs, like most cats, small dogs, rabbits Travel Friendly: Portable 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 Premium and Functional: Made of quality polyester and anti-scratch mesh, this expandable cat backpack is sturdy and safe for your pets. 2 side pockets to store pet supplies, and a built-in safety leash to prevent your pet from running away