Explosive energy return plus lightweight cushioning equals record-breaking speed in an updated racing shoe set on the amped-up responsiveness of ZoomX foam. The redesigned upper is lighter than ever, with asymmetrical lacing providing a biometric fit that eliminates the weight of an internal arch band. It sits on a full-length carbon-fiber plate that amplifies the responsive ZoomX performance to put consistent propulsion underfoot, from sprints to marathons and beyond, with targeted reinforcement along the forefoot putting durable confidence under every stride.