Shockwave S5 Corbin Mid-Back Seat - Onyx Black [SW-04920-B]S5 Corbin Mid Back Seat Onyx Black Designed to pair perfectly with the Shockwave S5 suspension bases, the Shockwave S5 Corbin Mid Back seat is a robust boat seat that comes equipped with folding armrests, a storage pocket, machined aluminum seat frames, fiberglass seat backs, and closed cell foam Corbin cushions made with marine grade vinyl. Designed for a marine environment, the Shockwave S5 Corbin Seat features lumbar support, race car styling, and