FCS II Matt Biolos Tri Fin SetFCS II Matt Biolos Tri Fin Set Design by Matt Biolos and refined by his diverse stable of elite team riders, the new high performance MB fin is an exciting addition to the range and sits comfortably in the Carver family. Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns