Product Description Material: breathable mesh + high quality leather + canvas S: 35 * 30 * 14 suitable for cats and dogs within 4 kg M: 40 * 35 * 17 suitable for cats and dogs within 8kg color:pink red green blue package includes: 1 x pet carrier backpack 1. Size: S: 35*30*14, M: 40*35*17, Suitable for cats and dogs with a back length of 4-8kg (need to measure your pet's length and weigh together for accurate reference) A little loose Measurement is more reasonable.2. Durable and Comfortable Material: Made of breathable mesh and polyester fiber, lightweight and comfortableideal for outdoor trips, sightseeing, camping trips, etc.3. Adjustable Straps & Inner Drawstring: Adjustable padded straps help reduce strain. An additional hip belt with buckle keeps the backpack stable. The inner rope with clip can be connected to your pet's collar/harness to prevent your pet from jumping out or hurting themselves. Holds it more securely.4. Padded Panels & Removable Bottom Cover: With EPE foam padded on the back and sides, reducing the burden and bringing you and your pet more comfort, this backpack/backpack will help your pet have a nice nap/outing . Removable, sturdy bottom cover makes replacing/cleaning easy.5. Peep Hole and Mesh Pocket Design: A drawstring neck hole at the top of the backpack for your pet to stick their head out, ventilate and view them, and enjoy the conversation with their host, adjustable hole string and soft mesh padding Perforated edge for safety and comfort. Side and front mesh pockets help store leash, whistle, water, snacks, treats and other necessities.