Noblag Waterproof Travel Sports Backpack Bag With Usb 。This incredibly lightweight multi-functional travel sports backpack bag with USB charging ports is perfect and useful for the excursion and any other outdoor activities and features headphone exit, side adjustment system of a backpack, waterproof backpack, resistance to wear, web massage shoulder, side water bottle pockets, 1 big compartment and 2 others with many pockets . Perfect for any sports. Material: High-quality nylon. All dimensions are 16 1/2\" x 11 1/2\" x 4 3/4\" or 42 x 29 x 12.5 cm .