The enveloping upper shoe with function-specific zones and scientifically optimised materials ensures an outstanding fit and pedalling performance. Two flat BOA Li2 twist locks enable precise micro-adjustment. The lower twist lock is also secured against unintentional release due to impact. The lightweight SHIMANO ULTREAD XC rubber outsole with a special tread pattern offers outstanding grip during the race. The flat midsole stabilises the foot and optimises power transmission. The heel cap with anti-twist protection ensures optimum foot positioning during strong acceleration and high cadence.