USB PORT DESIGN: With built in USB charger outside and built in charging cable inside,this usb backpack offers you a more convenient way to charge your phone while walking. Please noted that this backpack doesn't power itself, usb charging port only offers an easy access to charge LOTS OF STORAGE & MANY POCKETS: One separate laptop compartment hold 15 Inch Laptop as well as 16inch, 15 Inch,14 Inch and 13 Inch Laptop. One spacious packing compartment roomy for daily necessities,tech electronics accessories. Front compartment with many pockets, pen pockets and key fob hook, make your items organized and easier to find COMFY&STURDY: Comfortable airflow back design with thick but soft multi-panel ventilated padding, gives you maximum back support. Breathable and adjustable shoulder straps relieve the stress of shoulder. Foam padded top handle for a long time carry on DURABLE MATERIAL&SOLID: Made of Water Resistant and Durable Polyester Fabric with metal zippers.Ensure a secure & long-lasting usage everyday & weekend.Serve you well as professional office work bag,slim USB charging bagpack,college high school big student backpack for boys,girls,teens,adults GREAT GIFT IDEA: Graduation gifts for college students, high school students and middle school students. The best gift choice for men and women as Valentine's Day Gifts, Thanks giving Day gifts, or Christmas gifts. Special birthday day gift for him or her, your husband, daughter, son, father, mother and as a gift for friends