The heart of the Sonic SRS road shoe is a NGR Air carbon reinforced sole. NRG Air provides increased stiffness thanks to the new blend of nylon reinforced with fiberglass and enriched with carbon. The sole features the AirFlow ventilation system for comfort especially on long, hot rides. Most riders will use the traditional three-hole road cleats but the Sonic SRS shoes have dual compatibility with SPD pedals. This allows you to use these shoes with mountain pedals or in a spinning class with no special adapters required.
Two asymmetrical straps and a ratcheting buckle allow even closure pressure. Multilayer, thermowelded construction delivers a vented upper with fewer seams and pressure points. Northwave employs an integrated heel system to comfortably secure the heel without slippage and a performance footbed that keeps the foot in the best position to use the leg muscles for the best power and efficiency. Perhaps the best reason to try the Sonic is its great fit, low weight and looks all at a reasonable price.