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he Blue FLAP is a traditional blade for bi-fins with convex tips. They use a similar production design (aside from the tip) as the popular RED FALCON. The fin blade angle was increased to 29, overall length is 870mm (34”), and width is 205mm (8”) with a constant section water rail. Changes to the lamination process include an ultra strong, light weight and responsive Double Parabolic Curve (DPC). DPC is now a standard on all C4 carbon fins; it provides the most effective fin curvature during a diver's kick cycle for the most efficient propulsion possible. Thanks to the trademark DPC curvature, the 29 degree angle and the increased length, the performance of the Blue Flap is much higher than the previous C4 Flap VGR.,,These changes propel the diver through the water with a more hydrodynamic shape by reducing the profile which leads to a considerable reduction of resistance. Thus speed and efficiency is noticeably increased.,,The Blue Flap is made of 100% carbon T700 Megaforce with a large checkered fabric pattern.