Saucony Endorphin Pro 4 Carbon Plated Road Running Shoe.The Saucony Endorphin Pro 4 is a high-performance road racing shoe engineered to deliver exceptional speed and efficiency for runners aiming to achieve their personal bests. It features a dual-layer midsole combining PWRRUN PB and PWRRUN HG foams, an industry-first fusion that offers a balance of responsiveness and cushioning. The full-length carbon plate enhances propulsion and energy return, while Speedroll technology ensures a smooth, forward-rolling motion during runs. Additional design elements include a silky-smooth heel liner and integrated tongue system for a comfortable, race-ready fit.Key Benefits:Propulsive and Fast Ride: The Endorphin Pro 4 is built for speed. It features a full-length, S-shaped carbon fiber plate that is engineered for longitudinal stiffness and maximum metabolic efficiency. This plate works in tandem with the shoe's SPEEDROLL Technology to create a powerful, rolling sensation that propels you forward