Dacor Panther Fins Innovative operating OPB system (Optimized Pivoting Blade) - patented. Ultra-light technopolymer blade, high dynamic efficiency. The dynamic characteristics of this material has been conceived to obtain the greatest efficiency from the OPB system. This is the best compromise between performance, comfort and weight. New anatomical foot-pocket provides even more comfort. This makes donning easier, increases sole rigidity, and enhances the effort of the finning stroke. New ABS buckle with slider catch security system. 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, 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 divers muscular effort translates into effective thrust in the direction of motion. Another limitation of traditional fins is the degradation of the thrust produced during the finning stroke,with substantial differences between the maximum and minimum values. The O.P.B. system, on the other hand, ensures optimal thrust throughout every phase of the finning stroke, thereby minimizing fatigue and affording much more fluid movement through the water. The O.P.B. system also makes it possible to virtually eliminate the dead angles which normally exist when using traditional fins.

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