Common materials used to make truck bed covers include vinyl, aluminum, polycarbonate, high-impact plastic and fiberglass. Bed covers come in hard and soft models and can consist of a combination of materials to provide more features.
Many soft truck bed cover manufacturers use vinyl fabric for their roll-up and folding covers, but some add aluminum frames for rigidity. Hard truck bed cover makers use polycarbonate and aluminum to construct some folding and retractable covers. One of the most popular hard covers that lock is the high-impact plastic lid. Truck owners who want covers matching their truck's color purchase painted fiberglass lids.