Northwave Extreme Tech Plus Green Shoes 2016 Thermowelded Uni-Body Upper Featuring Biomap Technology For Better Fit And Reduced Weight S.L.W.2 Retention System Featuring Step-By-Step Adjustment For Tightening And Loosening Fit. Lifting Button Allows A Complete Release Of Tension For Quick Removal Ultralight Full Carbon Outsole With Uni-Directional Carbon For Maximum Stiffness And Reduced Weight Integrated Heel System With Non-Slip Material For Secure Fit Airflow System Prevents Overheating Of The Sole And Foot