FCS II Channel Islands CI Upright Tri-Fin SetA collaboration with Channel Islands Surfboards, the CI Upright is designed for speed and tight turns. A template that comes to life in punchy hollow waves, but can also suit conditions where you need the start up speed to get going. Ideal conditions for this fin set up is hollow steep waves and punchy beach breaks. Designed for Performance boards with deep concaves and moderate to extreme rocker. Fin Size Detail Size Area Depth Base Sweep Foil Medium