USB Charging Port Design: With built in USB charger outside and built in charging cable inside,this USB knapsacks offers you a more convenient way to charge your phone while walking.Please noted that this daypacks doesn't power charger itself, USB charging port only offers an easy access to charge Slim Durable Travel Backpack for Women Men This travelling back bag is made of durable waterproof nylon, good air permeability and heat dissipation with two padded shoulder straps, offers lightweight carrying and strength reinforcement, relieve shoulder pressure, and maintain cool when wearing for a long time. And it's hard, solid, and doesn't fade Separate Laptop Compartment Design & Practical Pockets: One separated laptop padded compartment holds 15.6 Inch laptops as well as 16 Inch,15 Inch 14 Inch and 13 Inch. The middle compartment is roomy for daily necessities, clothing, iPad, tech electronics accessories, A4 magazines,etc. The three front compartments make you