fcs ii mf mick fanning pc large surfboard tri 3 fin set, green-black fcs material: performance core performance core (pc) fins are made using a multi-layered resin transfer molding process. the flex pattern in pc fins extends progressively from the base through to the tip, helping the surfer to maintain drive and hold through a turn. this versatile fin material is light, and can be used in a variety of different conditions. ideal conditions open face, down-the-line waves, particularly good in point and reef breaks. board types designed to fit the fcs ii fin system. recommended for performance shortboards with moderate-to-extreme rocker. fin family carver: find power. powerful, drawn-out turns with added hold. size: x-small: under 55kg / 120 lbs small: 55kg - 70kg / 120 - 155 lbs medium: 65kg - 80kg / 145 - 175 lbs large: 75kg - 90kg / 165 - 200 lbs x-large: over 85kg / 190 lbs