FCS II Julian Wilson Performance Core Tri Surfboard Fins - Large/BlackThe FCS II Julian Wilson Large PC Tri Fin Set now made with Air Core construction for a faster more responsive feel. Features: Features: Julian's new fin focuses on speed and projection for taking flight and adopting a more progressive approach, while maintaining a feeling of predictability and control through longer arc turns. Updated in PC construction featuring our ultralight AirCore. Works Best in: Open face, down the line waves, particularly good