Abstract: A central panel has two ends. Two side panels are connected to the central panel such that each of the ends of the central panel is pivotally attached to an edge of one of the side panels. Each of the side panels includes a latch attachment member attached thereto. The side panels are rotatable toward a folded position against the central panel. The enclosure is adapted to be fixed to a tailgate when the tailgate is extended horizontally outward from a truck bed, such that the central panel extends along a long edge of the tailgate, the side panels extend along opposite short edges of the tailgate, and each of the latch attachment members engages a latch of the tailgate.