The UnderCover Flex is a folding tonneau cover for the 6 ft bed of the Mazda B-Series, combining a hard locking cover with roll-up convenience. Its FRP composite panels rest inside the bed rails, built-in prop rods let the truck be driven with the cover fully open, and rubber seals and drain tubes channel water out of the bed.

A tonneau cover closes over the open cargo box of a pickup truck to hide and shelter what is carried inside; depending on the design it rolls, folds, retracts or lifts open for access.

Listed for 1 vehicle: the fitment table on this page shows each year, make and model it fits.

Part number: FX21007

• Part #: FX21007
• Brand: UnderCover