This pet backpack is made of high-quality, durable polyester. The shoulder strap and back are made of breathable mesh and are in contact with the body, providing excellent moisture absorption and breathability. It is ideal for use in both hot and cold weather. Available in three sizes, choose the one that corresponds to your pet's weight and size. The zipper and elastic opening ensure optimal comfort. A built-in adjustable safety locking system allows the bag to be attached to the pet's collar, preventing it from escaping the bag and keeping it secure. Waist buckles provide additional support. The rigid bottom allows your pet to rest better and is easy to remove and clean. Side and front pockets allow you to store a foldable bowl, treats, a mobile phone, etc.