Northwave Rebel 3 MTB Shoes - Ylw Fluo/BlackCarbon XC 12 Sole with full carbon insert in the pedal area and a stiffness index of 12. 0. 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