Usa Business Backpack is made of waterproof nylon and oxford fabric and polyester lining. Large capacity main pocket includes 5 inner pockets can fit laptops up to 13.3", with additional 3 front pockets and 2 side pockets are available for water bottles, umbrella, phone etc in all different pocket. Built-in USB port on the side, you can charge phone by connecting the power bank (not included). Airflow padding and adjustable strap design make you comfortable in long trip. It’s convenient to put it on the pull-rod box with the fixed belt to free your back. Perfect for work, day trips, school, hiking, etc.