For optimal fit, we recommend sizing down half a size.High-performance mesh upper conforms to the foot, delivering breathability and incredible comfort.Midfoot support system locks your foot into position and improves the fit.External molded heel counter, for a dialed-in feel and added support.Tuned midsole foam delivers a lightweight, highly responsive ride.Molded flex grooves increase flexibility to improve the transition.Open-cell foam sockliner improves comfort and shock absorption.Full-length rubber outsole with aggressive traction pattern provides sure-footed grip.Reflective elements enhance visibility in low-light conditions