FCS FCS II CI PC L 3FINS COLOR:BLACK FLAME · MONSTA 2020 MODFISH · MONSTA 2020 ( 2 Fin Set ) FCS Compatible: These side bite fins are designed to provide the maximum amount of performance when added to a single fin on 2+1 surfboards "We designed the CI Upright because our surfboard range extended well into the hybrid and step down categories and we needed a fin to maintain response and turning performance on our boards where the rocker was a little more relaxed and flatter" Many of our team riders have also gravitated to this fin on their high performance shortboards and step ups where they wanted less resistance and the ability to stay right in the pocket"