Abstract: A convertible system includes a pair of movable side rails, each being connected to a structural pillar. A front header spans between forward ends of the side rails. A side rail latching mechanism releasably attaches the side rails to the structural pillars. A roof member includes a flexible, foldable roof panel and a panel header secured to and covered by the roof panel. The panel header has lateral end portions movably coupled to the side rails. The roof member is movable between a closed position, a pre-defined intermediate opened position, and a fully opened position. The roof member together with the side rails is further movable to a stowed position rearward of a vehicle occupant cabin. A roof member latch mechanism is mounted to the panel header for releasably attaching the panel header to the front header.