QUALITY: Self-locking zippers designed to prevent opening from inside the backpack, stable and consistent base, water-resistant nylon, and a steel frame to maintain structure. This Cat backpack carrier for large cats 17 lbs ensures safety and durability. MATERIALS: Made from high-quality, water-resistant Oxford fabric, commonly used in military-grade parachutes. This pet carrier is waterproof, scratch-resistant, and allows pets to breathe freely and relax. BENEFITS: Expandable and foldable design for easy storage, featuring a transparent window, built-in retractable safety hook, anti-escape zipper, soft cushion, side storage pockets, and reflective safety band. Perfect as a Dog carrier backpack for outdoor adventures.