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 8 kg Color: rose 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 within 4-8 kg back length (must measure your pet's length and weigh together for accurate reference), with each measurement a little loose will be more reasonable. 2. Durable and Comfortable Material: Made of breathable mesh and polyester fiber, lightweight and comfortable, perfect for outdoor travel, sightseeing, camping hiking and etc. 3. Adjustable Straps and Interior Drawstring: Adjustable padded straps help to reduce the burden. extra waist belt with buckle keeps the backpack stable. Interior rope with clip can connect to your pet's collar/harness to prevent your pet from jumping out or hurting themselves. keeps them safer. 4. Padding Panels and Removable Cover: With EPE foam padded back and sides, reducing the burden and offering more comfort for you and your pet, this backpack/knapsack helps your pet enjoy a nice nap/trip. Removable sturdy cover makes it easier to replace/clean. 5. Peep Hole and Mesh Pockets Design: A drawstring opening neck hole on the top of the backpack to keep your pet stick their head out, make them ventilative and visible, enjoy the entertainment with their host, adjustable hole string and soft mesh padded hole edge to ensure its security and comfort. Side and front mesh pockets help store leash, whistle, water, snacks, treats and other necessities.