FCS II Hayden Shapes Tri Fin SetFCS II Hayden Shapes Tri Fin Set FCS II HS Shaper Fin was 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