Overview -FCS II HS Shaper Fin designed by Hayden Cox from Hayden Shapes. -Perfectly suited to the HS Hypto Krypto and other higher volume board models with lower rocker. -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.