Energy Carbon Comp Outsole provides stiffness to drive all your power to the pedalIndex Energy Transfer: 60 The Mavic Ergo Dial QR on top of the foot offers strong tightening with a micro adjustment and a quick and easy release.The two Ergo Straps offer precise and easy adjustment.The Endofit(TM) Tongue hugs the foot in just the right places for maximum comfort. Features: - Speed-inspiring design lines - Graphic printed lining - Endofit(TM) Tongue - Ergo Dial QR