Rack Pack The ultimate school backpack, born from 16 ideas developed in collaboration with over 100 schools! Made with "CORDURA(R)", a water-repellent fabric known for its strength and durability. CORDURA(R) is a registered trademark of INVISTA. The main compartment zipper uses a YKK auto-lock zipper that prevents the opening from accidentally opening, even when the bag is full. It only slides when the pull tab is held, eliminating the worry of contents being exposed or lost. The front pocket features 3 small open pockets, 1 medium open pocket, and 1 zippered pocket. Additionally, there's a mesh pocket that can be used by fully opening the zipper and flipping it over. The bag stands upright, making it easy to see and access documents when placed next to a chair, and dividers help to organize them. In these times of frequent disasters, it's essential to have a way to signal danger or seek help. The integrated whistle on the chest belt, which secures the backpack to the back, allows you to instantly alert others to danger. It can be quickly converted to a handheld style to suit crowded trains or outings. Manufacturer/Brand: Polaris Product Name: Rack Pack Polaris Business Backpack Genre: Business Backpack Color/Design: Black (POLA-RACKPACK) Size: H46 x W30 x D17cm Material: 915D CORDURA Capacity: 24L Weight: 1100g There may be differences in specifications from the above documents and photos. There may be some scratches or stains on the zippers and surface. This is a used item, so thank you for your understanding.