BAK 19-20 Chevy Silverado 6ft 6in Bed 1500 (New Body Style) BAKFlip F1The BAKFlip F1 hard folding truck bed cover comes equipped with an FRP (Fiberglass Reinforced Polymer) top surface, providing superior dent, ding and scratch resistance. The heavy duty aluminum panels that line the underside give the cover its strength and durability. Together, these make the F1 our top of the line BAKFlip, offering a stylish and secure cover for the long haul. The F1s rugged design is made to perform in severe working and weather