Fiberglass, hard plastic or aluminum tonneau covers are also common. The retractable tonneau is typically made of vinyl, plastic or aluminum. Truck or car tonneau covers also conceal and/or cover cargo or personal belongings. Its convertible top folded under a flush fitting body-colour tonneau cover behind the front seats. Another option included a removable hard plastic tonneau cover for the pickup bed. The truck bed was built as a trunk, with a power tonneau and plush carpeting. Hard roll-up tonneau covers are more firm than regular roll-up tonneau covers. Side doors to tonneau and side doors to driver's seat. Some examples of covers are insulated, aluminum, rolling, or a tonneau. The 1910 Lambert model 36 touring automobile came with a detachable tonneau. A tonneau cover provides a solution. The 1909 Lambert model 30 automobile came with a detachable tonneau. The rear seats were closer together to make room for the tonneau cover. A tonneau cover reduces buffeting at all speeds. When retracted, the top was protected by a rigid tonneau cover.