A hard top structure for a vehicle having a roll-bar cage is provided. In one exemplary embodiment, the hard top structure may include a frame adapted to overlay on and attach to the roll-bar cage. The frame may include an upper frame member that defines one or more upper frame openings. Further, the upper frame member may have a channel member that extends around at least a portion of each upper frame opening. The hard top structure may also include one or more upper frame panels with each corresponding to one of the upper frame openings. Each upper frame panel may have an insert member that extends around at least a portion of a perimeter of that panel. Also, each upper frame panel may be positioned in one of the upper frame openings so that the corresponding insert and channel members form a seal joint.