For high-cadence riding, serious cyclists, and those who prefer a slimmer fit, the CX302 Narrow Cycling Shoe does the job and does it well. We like that it has a slightly narrower toe box and tighter heel for support, and the carbon fiber sole that increases power transfer and efficiency. But, don't be fooled into thinking this setup makes any sacrifices for comfort. With this shoe, we can ride for miles on end with speed and purpose.