1.[Strong Scratch Resistant Material] This cat carrier bag is made of scratch resistant polyester and durable nylon mesh. Sturdy and durable, it won't break even if your pet scratches or bites it. The overall frame of the pet carrier bag is made of one-piece steel wire folded out of the frame, , strong and will not be deformed. 2.[Comfortable and breathable dog cat carrier] This cat dog soft sided carrier bag has 4 sided breathable windows. It can ensure air circulation, so that your pet is not stuffy and unable to breathe inside the bag. The nylon mesh window also makes it easy for you to keep an eye on your pet at all times. 3.[ Dog Cat Travel Carrier Bag] Our cat dog travel carrier bags are TSA airline approved for most major airlines. The double strap design allows you to carry the pet carrier bag over your shoulder or in your hand, making it easy for you to carry it to any mode of transport, thus ensuring your pet's condition and all the way. 4.[Take care to choose the right size] Please measure your pet's length and height before purchasing, so that you can make sure your pet can stand, lie down and sit comfortably in the pet carrier travel bag. Here are two sizes of dog bags. The medium size is 18 inches long, 11.5 inches high and 11.5 inches wide. The large size measures 20 inches long, 13 inches high and 13 inches long.