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Engineered using advanced Computational Fluid Dynamics and developed with aerodynamics experts at the Aero Concept Engineering facility in France, the Giant Rivet and Liv Attacca on-road helmets slice through the wind while also providing optimal ventilation. The Rivet TT and Attacca TT helmets are designed specifically for pure competitive advantage in triathlon and time trials, where the smallest gain in aerodynamics is critical.