Springfield Marine Pro Stand-Up Boat Seat - Gray The Springfield Marine Pro Stand-Up Boat Seat is a bicycle style seat padded with foam for a comfortable seat or lean. Marine grade vinyl and Plastic substrate allows for durability in wet and sunny environments while not having to worry about any wood rot. The compact design allows for more room when standing up to finish. The universal mounting pattern 5 x 5 allows for easy install. Whether sitting or leaning this seat will provide stability and