Updated summer 2021 design with 3 fully ventilated sides. This pet carrier backpack for cat and small dog is designed for outdoor hiking and traveling for a long time without worrying about the bulkiness of the pet inside. 3-sided ventilated mesh material provides the best ventilation and airflow. Also provides a wider view and allows your pet to enjoy the sun and the scenery on your outings. Multi-Access Design: Front zip opening to allow your cat or puppy to get out and breathe easier . Built-in adjustable leash length with clip provides safety protection for your furry friends on your shoulders and back. Open the two giant side doors to have a cutting tunnel and you can animate the cat or dog and give them water and snacks more easily. Dimensions and specifications: 38.6 cm wide and 29 cm deep with free extra fanny pack to keep your personal stuff like phone and keys, also your pet's leash and treats. 16.5 inch tall pet backpack is suitable for large cats and dogs up to 7.3 kg, the entire pet backpack weighs less than 3 lbs. Steel frame with rigid support base to ensure durability. Padded shoulder straps and back provide a comfortable fit and an additional chest buckle to prevent the backpack from moving. check airline requirements before travelling. Suitable for cats, dogs and small animals: backpack for cats and small dogs, birds and other small animals. Comply with Amazon's return policy.