UnderCover engineers delight in regularly redefining the expectations of truck bed cover consumers, and quickly answered the demand for a hard tri-folding cover. The “FLEX” cover features a low profile, flush fit design and has the ability to lock securely in three different positions, providing up to full access to the bed without removing the cover. Flex quickly became one of the best-selling covers in the industry – and the new ULTRA FLEX takes it a step further with additional standard features including interior lighting, and carpeted underside.