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O.P.B. (Optimized Pivoting Blade) During the finning stroke, the structure of traditional fins tends to limit the flexing angle of the blade. As a result, and especially during the downward kick, only a small portion of the blade pushes the water in the direction of motion, while the remaining part pushes the water in the opposite direction. The O.P.B. system, patented by Mares and Dacor, ensures that the blade is always at an optimal angle during both the upward and downward strokes, thus considerably increasing efficiency. This ensures that all the diver’s muscular effort translates into effective thrust in the direction of motion. This is the design principle of the Dacor Panther that combines power and confort for demanding divers.
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