Maximum speed with the Saucony Endorphin Pro 4. These racing shoes are designed for those seeking lightness, reactivity, and explosive energy return, making them ideal for race day, intense paces, or quality training sessions. They feature a PWRRUN HG and PWRRUN PB foam midsole with a full carbon fiber plate for longitudinal stiffness and maximum metabolic efficiency. The Speedroll technology propels you forward, while the silky-smooth heel liner and integrated tongue system ensure a comfortable fit.