FCS II Haydenshapes PC + Aircore Tri-Fin SetThe FCS II Haydenshapes 'HS' Tri Fin Set is an all around template with a longer base for exceptional speed when driving off the bottom. 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 for a wide range of conditions, and waves.