Size: 42*30*13cm LOTS OF STORAGE SPACE&POCKETS: One separate laptop compartment hold 15.6 Inch Laptop as well as 15 Inch,14 Inch and 13 Inch Laptop. One spacious packing compartment roomy for daily necessities,tech electronics accessories. Front compartment with 2 zipped pockets, 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. 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. It's a great tech gift for him from wife, daughter and son. Please noted that this backpack doesn't power itself, usb charging port only offers an easy access to charge. 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.