1.Product SizeThis dog walking backpack comes in 3 sizes for cats or small to medium dogs. Before purchasing, be sure to measure the pet's chest circumference and the distance between the front and hind legs, and then select the appropriate size of the front dog carrier bag according to the size chart. > 2.5-Hole DesignThe belly pack for medium and small dog has 5 holes to allow the pet's limbs and tail to be exposed, so that the pet does not get not feel restrained. The pet's hands and feet can be stretched, which makes the pet feel comfortable and relaxed. 3.High Quality The average dog travel bag and small is made of canvas fabric, which is durable and easy to wash. The front of the medium small dog carrier is designed with mesh, which is cooling and breathable without being stuffy. Exquisite and delicate stitching will not damage pet's fur and skin. 4.SafetyZippers on both sides of the dog accessories travel bag make it easy to put on of the dog, the secure hook to attach the pet's collar guarantees that your pet will not jump out. The straps can be adjusted in an X shape to prevent the hiking dog backpack from slipping off the shoulders. 5.Widely UsedWith this small medium large dog carrier backpack, you can easily take your pet biking, shopping, taking the bus or taking them to the veterinary clinic. If you have any questions about our products, please do not hesitate to contact us. We will try our best to solve the problem for you.