The F series unique, strong, ultra light fiberglass construction delivers a performance fin for surfers who feel a little too much flex in composite fins and not enough in Carbon Lights. The progressive engineered flex is complemented by optimized asymmetric foil sections for maximum hydrodynamic efficiency. It has more speed, better response, increased acceleration. More hold and drive through carving turns and more fluid rail-to-rail. Small to larger surf, point breaks, reefs and beach breaks...we've got you covered.