Springfield Marine Yachtsman II Off White Boat Seat wMount Cushions The Springfield Marine Yachtsman II Boat Seat wMount Cushions a solid molded shell constructed in one piece. For proper use use included mounting plate 3100207 or any Trac-Lock slide sold separately. Plush foam cushions offer excellent support and comfort. Constructed with quick dry and heat seal channels. Cushions are easy to install, simply snap the cushions into the seat. The LLDPE plastic offers UV inhibitors for years of