Feature: 1. FOUR VENTILATION GRIDS: Cat backpack carrier is set up with four ventilation grids to ensure circulation inside the backpack while allowing pets to clearly observe their surroundings, making them more comfortable and less anxious. Comes with a pad that can be used in winter and summer. 2. FOLDABLE SUN : The top of the cat traveler backpack can be opened to allow pets to stick their heads out. The sunshade can be folded and pasted to improve ventilation or can be placed normally to prevent exposure to the sun. Fits most small to medium sized pets. 3. DESIGN: Pet carrier backpack has widened mesh shoulder straps that are for breathable comfort. The sternum strap and waist strap are designed to help reduce the load, increase comfort, evenly stress the shoulders and reduce back pressure. 4. BUILT IN : Dog backpack carrier has a built in to prevent pets from jumping out of the car when the roof is opened, ensuring pet safety. The zipper of the backpack has a lockable function to ensure that your pet does not open the door to escape on its own. 5. OXFORD CLOTH MATERIAL: Portable pet travel carrier is made of oxford cloth material, wear resistant and scratch resistant, light weight and easy to carry. The pockets on both sides provide more storage space for folded dog bowls, snacks, toys, garbage bags, etc. Specification: Item Type: Cat Backpack Carrier Material: Oxford Cloth Package List: 1 xCat Backpack Carrier 1 x Inner Cushion Note: 1. Please measure your pet's length: neck to the bottom of the tail, height: from the ground to the top of the shoulder before purchase. 2. In order to make the pet duffel bag more comfortable to use, it is recommended that the shoulder straps, sternum strap and waist belt be adjusted to the most comfortable state before use. 3. Please allow some error due to manual measurement.