The Morph Carbon 12 AAS sole with full carbon insert in the pedal area is characterized by a stiffness index of 12.0. The exclusive, made of TPU, Anatomical Arch Support allows the shoe a perfect fit to the arch of the foot. The ideal sole for every foot! In addition, the sole is compatible with Speedplay adapter for the smallest distance between foot and pedal. The Unibody construction combines large and strategically placed mesh inserts with ultra-thin reinforcements. The result is very good breathability and ventilation while maintaining maximum stability. The asymmetrical lacing distributes pressure at the top of the foot and directs it perfectly around the entire foot. More support from below is provided by the Performance Regular footbed. The SLW3 twist button with Extra Velcro - the only closure with gradual loosening and complete opening with just one button.