TheFCS II MH PC AirCore Code Red Tri Finsare 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 a little bit stiffer, while the fins are lighter and more reactive. It’s an accelerator fin that can be used in all conditions and feels loose off the top, but steady and fast when driving into a turn.