LARGE CAPACITY & WATERPROOF18 X 13 X 8 Inch.35L.The travel business backpack is made of high density waterproof polyester.Three spacious compartment and various independent pockets organize your stuff very well,such as college supplies,travel accessories,books,clothes,bottle,umbrella and key.Moreover,the main compartment is with padded Laptop compartment, which could protect your laptop 13 Inch,14 Inch,15 Inch, 15.6 inch up to 16 Inch.Suitable for daily life/business/trip/school. USB PORT & HEADPHONE JACKUSB port with built-in cable, offers great convenience to charge your phone while walking,via the headphone interface, you could enjoy music and audios at the same time.(powerbank is not in packaged) ERGONOMICS & REFLECTIVE STRIPComfortable airflow back design with thick and soft breathable padding gives you maximum back support. Adjustable "S" shoulder straps relieve the stress of the shoulders, and on the shoulder strap, designed with reflective strip, makes yo