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Fin school
FLEX
Stiffer fins are responsive but are more difficult to turn while flexible fins allow spring out of turns, but can be noodley and kill your drive if they are too flexible. Flex can make the difference between a board being too stiff or perfect, or making a late drop vs rag-dolling down the face of a wave.
flex options
Construction
We can take the same materials and use them differently in the construction of a fin to get different performance qualities. The Blackstix are designed with a springy twist in the tip, while the Techflex are designed to open out from the middle.

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It is impossible to look at the shape, foil, and flex of a fin independently. They all work together to create the feel under your feet. The Blackstix for example are designed to feel lively and to generate speed when you might be held back by the conditions. The V2 foil carbon fiber base creates lift, and the tip has less carbon so that the tip is snappy and flexible. The tip is designed to rotate perpendicular to the stringer during turns springing back releasing energy at the end of turns. Picture pulling back a bow and then releasing the arrow at the end of each bottom turn. The Techflex on the other hand, has a flat foil instead of a V2 so we designed the fin to open out so the cant will increase as the fin flexes in the middle (where there is no carbon). This enables the fin to generate more lift. The carbon in the tip makes the tip extremely responsive.
carbon & kevlar

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Carbon Fiber - Carbon Fiber has one of the best strength to weight ratios of any material. The energy you load up on a carbon fiber fin comes back in a burst of energy because of its Resiliency.
TEXALIUM

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Texalium - Aluminized Fiberglass that is stiffer than fiberglass, but more flexible and springy than carbon.
Honeycomb

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Honeycomb - Lightweight hexagonal core. Gives the fin the feel of glass-ons. Engineered with a medium flex pattern, stiffer than Blackstix but more flexible than glass and Techflex.
fiberglass

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Fiberglass - Stiff and tough for heavy conditions. Or surfers that appreciate very stiff fins.
G10

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G10 -This extremely stiff material is many layers of compressed fiberglass and epoxy. Perfect for big surf and tow-in boards, G-10 offers the ultimate in drive and control.
thermotech

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Natural Composite - Molded-resin with long-fiberglass matrix, this composite material fuses into a snappy and lightweight fin that retains the proper flex pattern for performance.