FCS II Retro Keel XL Twin Fins in WhiteThe FCS II Retro Keel XL Twin Fins in White feature a low aspect keel design tailored for fish shaped boards. These fins offer a fast, loose ride with minimal drag, thanks to their contemporary outlines and concave shapes. As the lowest area keel in the FCS lineup, they promote a more progressive and dynamic style on fish boards. Compatible with the FCS II Fin System, they are suitable for various board types, including fish, funboards, and twin fins.