Sherpa 2-in-1 Backpack Travel Pet Carrier, Airline Approved, Medium Gray Cat Carrier Dog Carrier AIRLINE APPROVED: The Sherpa Backpack Pet Carrier is airline approved and part of our Guaranteed On Board program, which provides comfort and peace of mind to pets and their owners; it's perfect for traveling by air, bus, car, or train MULTIFUNCTIONAL: The pet carrier can also be used as a hiking backpack, as well as a soft-sided crate for regular outings and vet visits with cats and small dogs; includes a large storage pocket for treats, leashes, and other small accessories PRODUCT DETAILS: Gray, Medium, 17" x 11" x 10.5"; fits pets up to 16 pounds. Excellent Condition - Never Used, Smoke Free Home, Fast Shipping!