About this item *Just enjoy a wonderful trip or vacation with LOSMILE Travel Backpack. This roomy, lightweight and sturdy bag is made of advanced waterproof Nylon, and is designed into variable size with pretty strong structure. It is a great choice for you. *Practical Compartment and Large Volume：19.29 X 12.20 X 6.30/Inch(L*W*H), 4 independent partitions,30L capacity, fit for laptop up to 15.6", A4 files, books, clothes, power bank, etc. *USB Port Design：With built in USB charger outside and built in charging cable inside, a separate zipper compartment in the bag to put the data line, easy to organize!This usb backpack offers you a more convenient way to charge your Devices while walking. *Shoulder Straps Comfort ：Contoured shoulder straps with mesh fabric and adjustable side compression straps. Padded back panel with a spine channel for maximum support, ventilation and comfort. *Upgraded Oxford Fabric and Zipper：Oxford foamed material: durable and waterproof, not easy to wrinkle and dirty. Glossy and more fashionable. High-quality zipper puller will prevent the zipper from getting stuck, long service life! *Multifunctional Backpack：The strap is designed to be widened and thickened, breathable, which effectively reduces shoulder pressure.Suitable for travel,camping,school,business,very convenience,the best gift for christmas. * After-sales service - no risk! Customer satisfaction is our top priority. If the backpack is damaged or unqualified, please contact us .besides ,if you are no only interesting in our backpack ,but also wanna customrized logo Or place the order with your own designs ,it's warmly welcome and we will make out the complete plan for your reference ,after your comments ,we will proceed based on that to guarantee the case success step by step under well control - You can put up to 15" Laptop, A4 books, ipad, glasses, wallet, keys, cell phone, umbrella, camera, clothes, shoes, etc in the bag.