360º surround wrapping upper creates a supremely engineered fit for all riders. Heel cup with anti-twist stabilization secures optimal foot positioning for intense acceleration and high tempo cadences. Function-specific zones and scientifically optimized upper materials maximize fit and pedaling performance. Dual low-profile BOA® Li2 dials allow quick and precise micro-adjustments. Integrated seamless midsole and upper construction set a new level of fit, stability and lightweight performance. Adjustable powerzone lace guide securely holds forefoot.