Transparent Bubble Front: The cat carrier backpack increase kitten puppy visual space through the hard shell window..Expandable Tunnel Bed: Gives small dog and cats more room by the expandable back panel..Excellent Ventilation: 9 large vent holes on both sides and front, and 2 side mesh pockets provide additional ventilation. The back expandable anti-scratching net provides maximum breathability that your pet will enjoy the outdoor time with you..Pet- material: Made with Made with quality Pet-Safe ABS material and oxford cloth for a long-lasting experience. The durable cat bubble backpack weights less than 3 lbs only, and can comfortably hold cats from 1-12lbs and small dogs from 1-10lbs..Functional and Cool: The clear cat travel carrier achieve your hands- and makes it easier to take care of your pet during hiking, travel, cycling and walking etc., whether you wear it on the front or the back. Most Airline Approved under seat. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.