Features:- External USB with built-in charging cable.- Made of water-resistant oxford, keep your laptop from rain.- Soft air permeability padded back cushion shoulder straps make it light and comfortable.- The front zipped pocket can hold your iPad/kindle and other small gears.- An anti-theft zipped pocket for the valuables.- This bag can be used for daily walk-around, day trips, vacation, travel, day hikes, school, camping.About Markryden:Since 2001, Markryden's major laptop backpack for more than 15 years.Target on Waterproof、USB design、anti-thief Backpack.Focus on the really quality Backpack.Mark Ryden now becoming more and more famous in the World