Designed for all day comfort the ACS seat features a visible, intuitive adjustment system, multi-laminate construction for optimal support and softness, an enhanced seating surface for superior air-flow and drainage and lateral stabilizers which lock the seat in place for that "one with the boat" feeling. The four-way adjustable seat tailors individual backrest height, thigh support, lumbar support and backrest angle to provide a truly customized ride. PLEASE NOTE: The ACS was not designed to fit all models. ACS seat kits can only be used to replace the Extrasport Xtra Comfort seats and does not work on old style Extrasport Xtra Comfort seats with ratchets. For further assistance please call customer service at 1-800-343-1555.