Breathable and Perspective: The cat backpack has 9 ventilation holes plus 2 side windows to provide complete air circulation and outdoor ventilation, even if the weather is hot, the pet will not feel stuffy in the backpack. Space Capsule Appearance: Cats love to keep an eye on their surroundings. The pet backpack uses a transparent window design, your cat will enjoy the journey more. Smooth zipper is easy to open and close. Airline Approval: Most airlines approve under the seat. On buses, subways, on the streets; Wear it on your back, you will get a lot of attention. Comfortable Handle and Internal Hook Design: There is a hook design on the back of the pet bag, which can fix the zipper and prevent pets from escaping. Backpack design with a sturdy handle on the top, easy to carry. Removable Bottom Mat: The soft and comfortable mat can be easily removed for easy cleaning and keep pets clean and cute.