Northwave sonic 2 road shoesthese northwave sonic 2 road shoes feature a carbon reinforced sole thermowelded multi layer construction and asymmetrical straps to provide the perfect balance of strength and comfort features nrg air carbon reinforced sole with a stiffness index of 80 and 5 vents for perfect airflowspd pedal compatible cleat plate not includedthermowelded layer construction combines multiple layers without overlaps for excellent ventilation and reduced weight3 lightweight asy