Made from 100% unidirectional carbon, the PowerShape Carbon 15 sole features the exclusive Powershape ® system on the arch of the foot that ensures 100% of rider power is transferred to the pedals without wasting any energy. Features: With a stiffness index of 15.0, this is the new performance benchmark for road soles NW Speedplay adapter compatible for the lowest stack height between foot and pedal Made with the patented XFrame 2 ® construction, the upper transfers every watt of power while providing the snuggest, even fit with no pressure points. The double SLW2 dial differentiates the pressure between the top of the instep and the toe for even better adaptability Integrated heel system containing directional fibre prevents any slipping Pro Regular Fit footbed with a stiffened dual density design increases the power transfer