A. Features 1. The dog backpack is suitable for small and medium-sized dogs. It comes in three sizes: S, M, and L, and you can select one according to your pet's weight and back length. 2. It is suitable for all four seasons. The dog backpack is made of durable polyester fiber. The shoulder straps and back material that contact the body are made of mesh fabric with good moisture-wicking and breathable properties. It fits the body and can be used from hot seasons to cold seasons. 3. The dog backpack has a zipper and elastic opening design, enabling it to fit your dog comfortably. It has a built - in adjustable safety lock that can be connected to the pet collar to prevent the pet from escaping from the bag and ensure its safety. 4. It is designed with a waist buckle to offer additional support. The hard bottom cover allows your pet to rest well, and the bottom cover is removable for cleaning. The side and front pockets can be used to store foldable pet bowls, snacks, mobile phones and other items. 5. There are two wearing methods. This hands - free puppy backpack can be worn on the front or back according to your preference. The neck window with a drawstring design allows your pet to stick its head out, providing ventilation and making it easy to observe, which can increase the intimacy during interaction with you. B. Specifications - Material: Polyester fiber - Colors: Green, black, blue - Sizes: S: 34×30 cm, M: 45×36 cm, L: 55×41 cm - Weights: 400 grams, 500 grams, 640 grams C. Package contents 1 dog backpack