NRG Air Carbon Reinforced sole with a stiffness index of 8.0 and 5 vents for perfect airflow SPD pedal compatible (cleat plate not included) The upper’s seamless unibody construction reduces pressure points. 4 breathable mesh inserts and pores across the entire surface ensure optimal ventilation SLW3 dial plus extra strap: the only dial with step-by-step and full release in a single button Stiffness Index-8 Weight-270g Country of Origin-Cambodia