FCS II Mason Ho Performance Core AirCore Thruster Fin Set - Large/Code RedThe FCS II MH PC AirCore Code Red Tri Fins are Mason Ho's accelerator fin that come in a thruster (3 fin) set. They are a combination of a few different templates, including Mick Fanning's signature templates as well as Kelly Slater's original K 3 fins. The foil, tip profile and flex have all had a re work with input and testing from Mason. It features a beveled edge that allows for smooth transitions and the Performance Core + AirCore makes the flex