Sidi Wire Carbon Vernice Road Shoes 2015 Soft Instep 3 closure system for microadjusted fit Light weight and stiff Vent Carbon Sole with integrated air channels Techno-3 System dials with proprietary non-binding wire for custom fit Adjustable Heel Retention Device reinforces heel cup for better fit during high movement moments Sidi Heel Cup for added durability and stable footing