The enclosing upper shoe with function-specific zones and scientifically optimized materials ensures outstanding fit and pedal performance. Two flat BOA® Li2 rotary closures allow for precise micro-adjustment. Additionally, the lower rotary closure is secured against accidental release due to impacts. Lightweight SHIMANO ULTREAD XC rubber outsole with a special tread pattern offers excellent grip during races. The flat midsole stabilizes the foot and optimizes power transfer. Heel cap with anti-twist protection for optimal foot positioning during strong acceleration and high cadences.