A convertible top system for a vehicle having structural support for a vehicle roof includes an overhead cover system having a perimeter frame configured to couple to the structural support and defining a plurality of overhead openings, and a plurality of cassettes configured to releasably couple to the perimeter frame such that each cassette of the plurality of cassettes is operably associated with one of the overhead openings. Each cassette of the plurality of cassettes includes at least one of a retractable mesh screen and a retractable shade configured to be moved between a fully open position that does not cover the associated overhead opening, and a fully closed position that covers the associated overhead opening.