Abstract: A cargo restraining system for use in a trunk or cargo area of a vehicle includes at least one restraining unit. The restraining unit comprises a bottom panel, a face panel, and a back panel. The bottom panel and the face panel are hingedly attached together along adjacent edges. The back panel is hingedly attached to face panel along the edge opposite that to which the bottom panel is hingedly attached. The restraining unit can be erected from a flat configuration wherein the three panels are substantially coplanar with each other to an upstanding operational or functional configuration. In the upstanding configuration, the bottom panel sits on a surface, the face panel is pivoted upwardly to extend vertically from the surface, and the back panel is hinged downwardly at an angle and its free edge is attached to the free edge of the bottom panel.