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Kick it into high gear. The Vortex V-8's high performance and superior maneuverability is achieved by combining patented Nature's Wing® Propeller Fin Technology with state-of-the-art materials. The V-8 is designed to provide greater thrust while reducing muscle fatigue. The dual blade design allows the diver to make a much more efficient flutter kick, thus reducing the amount of effort needed to propel the diver through the water.