【Large Space】This 12.59x 7.08x 18.11 inch large travel backpack has a capacity of 20-35 liters .One separate laptop compartment hold 15.6 Inch Laptop as well as 15 Inch,14 Inch and 13 Inch Macbook. Main compartment can accommodates your daily necessities (books, notebook, binders, stationery, clothes and etc). One organized compartment with pen pockets organizes your small items and makes them easier to find. Side Pocket for water bottle and compact umbrellamake and Rear Padded Pocket for your 【USB Port & 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. 【Comfy Pad & Breathable Straps】Comfortable airflow back design with thick but soft multi-panel ventilated padding.STRAPS: The unique shoulder strap decompression design with massage mats helps relieve stress on your shoulders.