Designed for cats and small dogs, the upgraded Petkit Travel Backpack has a large window so your pet can always see what's going on outside. The intelligent ventilation system will ensure your pet is comfortable. You can also manually adjust the airflow speed and soft lighting, and you can turn it on as needed. The backpack is extremely lightweight and comfortable, yet durable. The breathable mesh back and specially designed reflective straps provide unparalleled wearing comfort.