The r4b offers a carefully crafted blend of comfort and light weight, fit, power transfer and aerodynamic efficiency. The single boa ip1-a closure control is light, fast, secure, aerodynamic and comfortable - and is complemented by a pair of light, neatly adjustable micro-straps. The r4b's injected carbon fiber outsole is stiff for power transfer and sculpted to aid aerodynamics. It combines with the proven supportive and comfortable fi'zi:K cycling insole with sculpted foot beds and supportive heel to ensure that every precious watt goes straight into your pedals. The r4b's microfiber upper is hard-wearing, light, and resilient with enough flexibility to ensure comfort for every rider's foot, but strong enough to withstand the demands of racing - without any weight penalty. The diamond-shaped laser-cut perforations help temperature management.

Fizik R4B Uomo BOA Carbon