Design details: Built-in USB charging port. Expansion gusset provides more packing ability. Expansion gusset provides more packing ability. Ergonomic airflow back panel. Luggage loop allows the backpack to slide through the luggage handle for easy portability. Interior design details: Padded 15" laptop compartment. 2 front zippered pockets. 2 large zippered compartments. Multiple organizer pockets, compression straps, and built-in key hook. Measures 12in wide x 16.4in high x 5in deep