9 Ventilation Holes Design: 9 breathable ventilation holes and 2 side windows for full air circulation and ventilation outside, puppies and cats can stay in this backpack without feeling stuffy Transparent Window: This pet bubble carrier backpack as a transparent space capsule allows pets to see the outside view exactly, allowing them to enjoy the sun and the scenery Comfortable Handle: Backpack design with a sturdy handle on the top, easy to carry. Smooth zip easy to open and close Internal hook design: There is a hook design on the back of the bag, which can fix the pull rope and prevent pets from escaping Detachable bottom mat: Soft and comfortable mat can be easily removed for easy cleaning and keep pets clean and cute Features: Carry pets to travel around the world together The hard space capsule shell prevents the backpack from biting and scratching and effectively protects your pet from dust, pollen and flu With a small pocket on the side to store food in case the animals get