FCS II Channel Islands AM Performance Core Tri Surfboard Fins - XS/CyanThe FCS II Channel Islands AM PC Medium Tri Fin Set is Al Merricks Shaper Series fin with a raked side fins produce exceptional speed and drive. Features: Features: Al Merrick's template is designed for radical, progressive surfing. The raked side fins produce exceptional speed and drive, while the smaller centre fin on the medium and large template offer quick release through turns. Works Best in: Hollow steep waves, punchy beach breaks. Works Best