TONNEAU SYSTEM FOR USE WITH A PICKUP TRUCK

A tonneau system for use with a cargo box of a pickup truck. The tonneau system includes a pair of side rails for mounting to the sidewalls of the cargo box and a tonneau cover having at least two tonneau sections and being moveable relative to one another between an unfolded state and a folded state. In the unfolded state the tonneau sections substantially covering the cargo box and in the folded state the tonneau sections being arranged in a stack. The stack of tonneau sections is pivotally connected to the side rails by a pivot connection that is moveable between secure and release positions. In the secure position, the stack being retainingly engaged with the side rails and, in the release position, the stack being removably engaged with the side rails whereby the stack is removable from the cargo box while the side rails remain mounted therewith.