Flash Flooding, thunderstorms and/or white river rapids are no match for the K3 PRO-TECH 20 Liter Dry Bag Backpack. Built with ultra-rugged construction and RF heat welded water tight seams, you & your gear will shed water in style. Simply stated.......premium product, supreme functionality & un-mistakable style. Introducing the K3 Pro-Tech Waterproof Backpack. A smart essential for the stylish adventurer.