The FCS II Mason Ho PC AirCore Tri Fin Set combines influences from Kelly Slater’s K-3 and Mick Fanning’s templates, enhanced by Mason’s feedback and testing. This versatile fin sits in the Accelerator Family, providing steady drive off the bottom and fast, loose performance off the top. Featuring a beveled leading edge for smooth transitions and Performance Core + AirCore construction for lighter weight and stiffer flex, this fin is designed for explosive responsiveness. Suitable for all conditions, it’s ideal for surfers seeking a dependable, high-performance fin.
Fin Size Detail
| Size | Fin | Height | Base | Area | Sweep | Foil |
| Small | Side | 4.40″ [111.8mm] | 4.25″ [107.9mm] | 14.06″ [9074mm] | 34.9° | Flat/Bev |
| Center | 4.40″ [111.8mm] | 4.25″ [107.9mm] | 14.06″ [9074mm] | 34.9° | 50/50 | |
| Medium | Side | 4.53″ [115mm] | 4.37″ [111mm] | 14.88″ [9602mm] | 34.9° | Flat/Bev |
| Center | 4.53″ [115mm] | 4.37″ [111mm] | 14.88″ [9602mm] | 34.9° | 50/50 | |
| Large | Side | 4.65″ [118.1mm] | 4.49″ [114mm] | 15.70″ [10130mm] | 34.9° | Flat/Bev |
| Center | 4.65″ [118.1mm] | 4.49″ [114mm] | 15.70″ [10130mm] | 34.9° | 50/50 |
