Fi'zi:k's Tempo Decos Carbon Cycling Shoe features a full carbon R2 unidirectional outsole and Li2 Boa fit system. to become synonymous with performance. Polyurethane laminate over mesh upper provides high durability and some breathability and the minimalist Boa single dial ensures a comfortable fit which can be adjusted on the go. This shoe has a flex rating of 10 on an R2 outsole. which means she is ready for any race or serious training where we don't want to waste watts.