LARGE CAPACITY& ORGANIZED: This 14.57 x 9.84 x 19.2inch large travel backpack has a capacity of 45 liters. It built with a 17-inch laptop compartment, a spacious main compartment, 2 front pockets, an anti-theft backpack in the back side and 10+ multi-functional pockets. Main compartment can accommodates your daily necessities (books, notebook, binders, stationery, clothes and etc). Front compartment with pen pockets and a key fob hook organizes your small items and makes them easier to find. USB PORT and EARPHONE HOLE: Connect your own power bank to the set-in charging cable of this mens backpack, then plug your phone's charging cable into the external Micro-USB to charge your phone. (Please noted you need to prepare your own power bank.) You also can listen to your favourite music using the hands-free headphone hole. PREMIUM MATERIAL & COMFY This large laptop rucksack is made of water-resistant and anti-scratch polyester fabric with double-sided smooth zippers and heavy-duty, high density nylon lining for lasting durability. A comfortable airflow foam-pad back design with soft, multi-panel breathable mesh padding provides maximum back support. The unique shoulder strap decompression design with massage mats helps relieve stress on your shoulders.