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.