Dimensions of dog carrier backpack: This size dog backpack measures 30 x 16 x 35 cm, suitable for small and medium-sized dogs/cats whose weight ranges from 1 to 3 kg. Please check the size chart before purchasing. Adjustable Neck Hole: The neck hole of the front dog carrier backpack with a drawstring, easy to adjust opening size to keep your pet's head moving freely to get a good eyesight and not too tight, so you can communicate with your pet intimately. And the dog backpack is made of breathable mesh fabric and high quality fabric, which ensures your dogs/cats feel comfortable. comfortable inside. Secure & Detailed Design: The puppy carrier backpack with built-in adjustable safety buckle with clip can connect to pet's collar/harness which will prevent pet from escaping and keep the pet safe. 'pet safe. The adjustable waist strap with buckle keeps the backpack stable and gives you extra support and prevents falls. This pet carrier backpack has two side pockets and one pocket front,