EXPANDABLE & COLLAPSIBLE: The expandable cat backpack of this pet backpack carrier can make your pet have more room for movement, and the mesh design can increase air circulation and effectively reduce anxiety. The convenient folding design of dog cat carrier makes it easy to fold and store when you don't use the backpack. STURDY & SAFETY DESIGN: This Dog backpack carrier for small dogs Made of High quality cationic fabric and 210D nylon lining, soft feel, not easy to fade, wrinkle resistant and wear-resistant, environmentally friendly, non-toxic, non-irritating, and can be used for a long time while providing safety and comfort for pets. The dog cat carrier backpacks has a built-in hook safety rope to prevent your pet from escaping. GREAT BREATHABLE & BETTER VISIBILITY: This Cat carrier backpacks is12 air holes, zippered mesh windows at both sides and top, and acrylic at the front can provide good ventilation and visibility, keep the air unblocked and not stuffy, and cooperate with self-adhesive soft mat at the bottom to keep pets comfortable during the journey. cat backpack the rollable cloth cover on the top can prevent sun when needed. FIT FOR MOST SMALL AND MEDIUM-SIZED PETS: Our premium pet cat dog carrier backpack is quite scratch the size of the kitty puppy carrier is 17.3 x 13.4 x 10.6 Inches (H x W X L), and the expanded size is 17.3 x 22.4 x 10.6 Inches (H x W X L), which is suitable for most small and medium-sized pets. The recommended maximum weight is 15 pounds. Please measure the pet's length (front foot to bottom of tail) and height (floor to top of head) before purchasing. COMFORTABLE TO WEAR & PORTABLE: This cat carrier backpacks is shoulder strap are equipped with padding, which can increase the comfort when using. The waist buckle is equipped to provide you with additional support, which helps to reduce the load during long distance travel. The handle design on the top of the cat backpack makes the cat dog backpack carrier more portable and can be used for traveling, cycling, camping, etc.