Carbon XC 12 Sole with full-carbon insert in the pedal area and a stiffness index of 12. TPU inserts in strategic points ensure high traction and outstanding wear resistance,The BioMap unibody construction upper has a more anatomical, wraparound design that minimizes energy loss to the pedals,TPU thermowelded reinforcements for added protection,Double SLW3 dial, the only dial with step-by-step and full release in a single button for optimal pressure distribution,Performance Regular footbed provides greater support.