The UnderCover Flex is a hard folding tonneau cover that gives you the ultimate control of your truck bed, offering three secure riding positions. The cover is easy to remove, requires no drill for installation, and is mounted flush with your trucks bed rails making it the most water=tight hard folding cover on the market. Each panel is made of high quality FRP composite material; which is lighter, stronger, and more dent resistant than aluminum. Each Flex has a bed rail mounting system equipped with rubber seals and drain tubes that carry water away from, and out of the bed, keeping your gear dry and secure. Best yet, Flex is back by a 3-year warranty slowly making it Americas favorite hard folding tonneau cover.