The Overton's Premium Contoured Boat Seat features an ergonomically designed seat pan and back to deliver maximum comfort. High-compression foam padding covered in UV-treated marine-grade vinyl provides lasting support. The seat back lock-down mechanism delivers positive locking in the folded position. Measures 18.5"W x 16"D x 24"H. Fits universal 5" x 5" hole pattern. UV-treated marine-grade vinyl resists fading Seat back lock-down mechanism delivers positive locking in the folded position Measures 18.5""W x 16""D x 24""H