Boa L6Z twist fastener on the instep with protective shield on the lower Boa for quick and comfortable fixation of a wide variety of foot shapes. Renewed upper material layers and appearance with inkjet printing. Integrated seamless midsole and upper construction for unrivalled fit, stability and lightness. Ultread Xc rubber outsole with technical racing tread pattern offers the ultimate combination of light weight, high traction, reliable stability and durable pedal grip. Enveloping, slightly overlapping upper shoe ensures a snug fit. Carbon fibre-reinforced nylon midsole for good power transmission. Flat midsole stabilises the foot and ensures maximum power transmission.