Backpack style:Large laptop backpack/ Business work backpack/ TSA travel backpack/ School backpack black/ Backpack with laptop compartment/ Waterproof laptop backpack/ Backpack with USB charging port/ Hiking backpack/ Daypack manLaptop Backpack size: 20 14.9 10.2 inches (51 38 26 cm)Material: High quality tear-resistant and waterproof polyester fabric, high-density nylon liningStyle: Work Travel Business School College CasualLarge multi-compartment and pocket (How do you organize stuff?):1. Main Compartment: Easy-to-hold clothes, travel accessories, books, cosmetic bag, camera, tech electronic accessories, shoes, etc2. Front Compartment: Hold cellphone, pens, keys, pouch, glasses, earphone and other small items3. Side deep zip pockets: passport, money, wallet or other valuables4. Mesh side pockets: Elastic mesh pockets on both sides, suitable for water bottle, umbrella and other items5. Hidden front pocket: sticky notes, tissues, etcUSB port and headphone hole:1. External USB charging port with integrated charging cable for easy charging of your smartphone (portable power supply is NOT included with this backpack)2. The headphone jack is convenient for hands-free listening to your favorite music while walkingBreathable backpack and luggage design:Laptop daypack with U-shape three-dimensional ventilation design on the back, more air convection and heat dissipationThe luggage strap allows you to attach travel laptop backpacks to luggage or suitcases for easier carrying