Cool waterproof backpack with usb for traveling with KINGSONS tech on aliexpress. More than 3,000 orders just for this cool backpack - that's saying a lot. A roomy and really impenetrable backpack whose main feature is an external USB connector through which you can connect your phone or laptop to the powerbank that lies in the backpack. Large very roomy backpack with lots of pockets to distribute the load inside. Special compartment will fit a laptop up to 17 inches. The back is thick and airy, as are the straps, making the back very comfortable and does not sweat. Handle is sewn in tightly, it's sure not to come off, no matter what the weight. The straps are made so that the weight of the backpack is distributed as evenly as possible on the shoulders and back. High quality and free shipping.