Giant Rivet Tt Helmet White

Fine-tuned through Computational Fluid Dynamics for optimal aerodynamics. Unbeatable performance for TT testers or triathletes. Front to back, every curve and shape of the new Rivet TT is fine-tuned through Computational Fluid Dynamics for optimal aerodynamics.  And on the road, it delivers unrivaled fit and comfort to real-world athletes like triathlete Tim Berkel, who helped refine its design. The helmet uses a Cinch Pro fit system to allow you to achieve the perfect fit and position of the helmet. To keep your head cool Giant have built in ultra-deep internal channels into the design of the helmet which allows cooling air to flow directly over the head.  Super tough polycarbonate shell Ultra-deep airflow channels Cinch Pro fit system Description by Mike, Rutland Cycling Web Team.