FCS II Hayden Shapes Tri-Quad Fin Set FCS II Tri-Quad (5 fins) Shaper Fin designed by Hayden Cox from Hayden Shapes. Perfectly suited to the HS Hypto Krypto and other higher volume board models with lower rockers. This fin produces exceptional speed when driving off the bottom, especially on longer open-face waves. Ideal Conditions A wide range of conditions, and waves. Board Types Designed to fit the FCS II Fin System. Perfectly suited to the HS Hypto Krypto and other higher volume board models with lower rocker Fin Family Reactor: Find Speed. Speed, tight turns & snaps. Sizing Medium (65Kg - 80Kg / 145 - 175 Lbs) Large (75Kg - 90Kg / 165 - 200 Lbs)