Power Flex is a Pro Teck Fin with a medium core flex. The fin bends on turns, and then springs back, creating forward thrust similar to a swim fin. The medium flex core and flexible trailing edge makes the board turn smooth and fluid, with continuous speed.
Power Flex Fins are recommended for intermediate to professional surfers.
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I've got several sets of these (futures and FCS). they are incredible fins. The power flexes are springy and increase turning radius, and the performance fins are tighter in the pocket. These fins are awesome and they are so much safer than regular fins. Fin cuts can be super dangerous. These rubber edges are sturdy enough not to be noticeable when surfing. Love these fins and Surfco is awesome to deal with.
Fins are amazing