Shimano RC903 S-PHYRE cycling shoes built for racing combines a combination of high-performance technologies which allow you to go the distance faster. Women's-specific DYNALAST technology provides the perfect balance of support and comfort which provides a more natural fit to the shape of the female foot. Combine this with optimal stiffness and heel cup prevents twisting and you will definitely feel a decrease in fatigue increased power transfer and pedaling efficiency. Cross lace pattern with double BOA Li2 discs distributes pressure evenly throughout the leg , eliminating pressure points and hot spots providing a comfortable and secure fit.