Wise 8WD1007 Captains Chair is constructed with thick wall rotational molded plastic frame with pre-mounted plastic injection molded mounting plate with T-Nut inserts. Snap on and off cushions have high compression foam padding with mesh underlay to expel moisture. UV and mildew treated marine grade vinyl with embossed vinyl surface. Padded arm rests. Mounts to any BIA standard pedestal system.