This pet travel carrier fits small and medium pets up to 15" in length x 9" in height and up to 15 lbs. Please do not choose your airline pet carrier bag based on weight, please reference your pet's length and height in selecting a carrier size. There are 4 side mesh windows for ventilation and for your cat to see out. The top and two-sided entries allow you to get your cat in then and out easily. Also, the self-lock zippers will keep your cat from escaping. This dog carrier is made of durable oxford cloth and chews and scratch-proof mesh. Besides, our dog travel carrier comes with a soft washable wool mat for your pet to lay on, which also has a solid base to make it stable. An adjustable shoulder strap and handles for an easy side. Also, you can fold it for storage. Please note: we offer a lifetime two-sided on our airline-approved cat carrier.