About this item Expandable dimension: The carrier measures 17"L x 13.5"W x 11"H, fits small and medium pets up to 20 lbs. Dual side expandable to 17 x 13.5 x 36 inches Humanized design: Front and back sides are both expandable, increasing your pet's activity space by 200%. Six mesh ventilated designs provide good airflow and scenic views Strong quality: Made with 600D high-quality Oxford material, lightweight, easy to clean, and features a strong steel wire skeleton structure Safety and comfort: Reflective stripe enhances safety during evening travel, front pockets offer convenient storage for supplies, and secure zippers and buckles prevent escapes Collapsible design: The backpack can be folded into a small bag for easy storage when not in use Versatile compatibility: Suitable for bicycle travel, accommodating both cats and dogs Spacious interior: Ample room for pets, measuring 17"L x 13.5"W x 11"H, and expandable to 17 x 13.5 x 36 inches › See more product details