True Ames L-Flex 9.0" Longboard Fin - SmokeDesigned by Malibu legend Greg Liddle, the L Flex fin was originally intended to be paired with the modified displacement hull surfboards he became famous for pioneering beginning in 1968. This surfboard design is borrowed from the same hydrodynamic principles in boat hullsit has a convex bottom contour which enables riders to trim more forward and find plane in waves with less power. And it requires a complimentary fin with a solid, finely tuned