FLAT: A flat inside face combined with a convex outside face. The traditional flat sided foil offers an even combination of drive, pivot and hold and provides a very consistent, reliable feel over a wide variety of conditions.
INSIDE: A sophisticated hydrodynamic foil consisting of a convex outside face, a rounded leading edge and a concaved inside face. Inside foil increases the efficiency of water flow over the surface of the fin adding lift and reducing drag. The result is a fin with more options through increased hold and speed.
50/50: A symmetrical foil used on all centre fins where both sides are convex. Even water flow on both sides creates stability
FLAT: Mimics the performance of a regular side fin offering fast transitions between turns, quick release and added hold on rail. (Ideal for boards with a wider tail, performance shortboards and boards with rear fins positioned close to the rail)
70/30 or 80/20: Combines the performance of a centre and side fin offering increased speed, smooth rail-to-rail transitions and a consistent feel in a variety of conditions. (Ideal for all board types and rear fin placements)
50/50: Mimics the performance of a regular centre fin offering increased pivot with the added advantage of stability and control. (Ideal for all board types and rear fins positioned closer to the stringer)