1.LARGE CAPACITY & EXPANDABLE:This extra large travel backpack with expandable feature you more packing capacity up to 42L.One separate laptop compartment hold 17 Inch Laptop as well as laptop accessories,textbooks.One spacious packing compartment roomy for daily necessities,clothes.Front zipper pocketx2,side pocket for water bottle or umbrella,back anti-theft zipper bag which can store valuables such as mobile phone or cards.These small designs keep your items neat and easier to find 2.FLIGHT APPROVED CARRY ON BACKPACK:This versatile travel backpack meets the carry on requirements of most airlines, so you can put it under your seat or overhead bin to save extra money. 180 degree zipper closure helps you pass through the security check quickly. Perfect as an everyday backpack, laptop backpack and casual backpack for weekend getaway trips.Travel gifts for both men and women 3.EXTRA 3 PACKING CUBES+1 SHOE POCKET:This weekend travel backpack comes with three packing cubes. large cube and medium cube for clothes, personal item. Small water resistant cube with transparent side for providing clear overview of Toiletries. there's also a shoe pocket. Keeping your belongings neater and more organized. Serve you well as carry on bags for airplanes, weekender backpack, personal item travel bag, overnight bag 4.HUMANIZED DESIGN:The travel bag is made of high-quality water-resistant fabric, durable, anti-wrinkle,wear-resistant,and with sturdy metal zippers.Comfortable soft padded back design with thick but soft multi-panel ventilated padding, gives you maximum back support. Hideaway padded shoulder straps which can be hidden away in the zippered back panel when not using. The back trolley sleeve design can fix the backpack on the trunk, which is convenient for hands- transportation and carrying 5.CONVENIENT USB PORT DESIGN:With external built-in USB charger and internal built-in charging cable, this USB backpack provides you a more convenient way to charge your phone, ipad and laptop. Please note that this backpack does not include the power bank itself