http://www.simplysnorkel.com/products/Mares/InstinctProFin.aspx
The Instinct Pro Fin is from Mares Apnea and Freediving range. This Mares fin has a tapered blade to provide maximum power and thrust through the water and micro ribbing on the blade optimises the divers efficiency. Mares have added tapered elongated lateral stringers to ensure that the blade’s deformation is progressive and in order to create a channeling effect in the water. This V shaped blade prevents the risk of any slipping and the foot pocket is not only comfortable but holds the foot to provide extra power to the blade.

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