BOA® L6 rotating closure at the tension for quick and comfortable fixation of various foot shapes. Integrated seamless insole and upper construction for unparalleled fit, stability, and lightweight design. The ULTREAD XC rubber outsole with a technical race profile offers the ultimate combination of low weight, high traction, reliable stability, and lasting pedal grip. Upper made of mesh fabric/TPU and synthetic leather in optimal distribution provides a comfortable fit and low weight. Enveloping, minimally overlapping upper ensures a snug fit. Carbon fiber-reinforced nylon insole for good power transfer. Flat midsole stabilizes the foot and ensures maximum power transmission.