Best-selling: The Crono CR3 features the BOA® Fit System L6, offering the convenience of a micro-adjustable closure at the top of the shoe combined with straps at the bottom. It inherits the front vents and air vents from its older sibling and is equipped with premium features like a stacked closure and non-slip heel padding, making the CR3 the ideal shoe for the most discerning amateurs. Technologies: SG - SUPER GRIP - Specially rough lining that prevents the foot from sliding inside the shoe. HVS - HIGH VENTILATION - Special perforations at the front and back to help air cool the foot SP - SPECIAL PROFILE - Plastic heel counter with high heel support