Rubber Outsole with high friction rubber treads for extra grip Carbon-reinforced nylon midsole BOA IP1 closure system (bi-modal: tighten and complete release Neutral fit to accommodate the majority of foot shapes Volume : low/medium/high Fi'zi:k Cycling Insole Weight : 385g (size 42.5, without insole) Color & Size Availability : Black/Red - 44 Black/Blue - 42