About this project Pet Backpack Dimensions: 12.5"L x 6.6"W x 16.5"H. Perfect for dogs under 10 lbs or cats under 12 lbs. Fits cats, puppies and most other small pets with ease Designed for maximum convenience and comfort for you and your pets while hiking, traveling or taking your best friend to the vet or for a walk in the park. Keep Your Pet Comfortable: The removable comfort pad is easier to clean and let your pet enjoy inside. The most important improvement of this backpack is that it guarantees excellent ventilation and visibility at the same time. 1 large clear acrylic window, 2 ventilated mesh windows and 12 ventilation holes provide your pet with plenty of air and a great view. Comfortable to wear: The shoulder straps have thick padding for extra comfort on long journeys. Waist and chest buckles give you extra support to keep the pack stable and prevent pets from slipping.