Power Flex is a Pro Teck Fin with a medium core flex. The fin bends on turns, and then springs back, creating a forward thrust similar to a swim fin. The medium flex core and flexible training edge makes the board turn smooth and fluid with continuous speed. Power Flex Fins are recommended for intermediate to professional surfers.
This quad set includes four (4) 4.5" fins.
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I have wipe out before and fallen on these fins, only a bruise!