endorphin speed 4< endorphin

introducing the endorphin speed 4 now in fresh winter-inspired hues. built to conquer any season the endorphin speed 4 is more than a race-day shoe. it’s equally capable during long, moderate training sessions and sprints to the finish. thanks to the “just right” combination of winged nylon-plate, speedroll technology and pwrrun pb foam, this lightweight running shoe provides the perfect balance of support, rebound and forgiveness. features & benefitssmooth speedroll technology for effortless speed, smooth turnover and propulsive forward motionpwrrun pb foam is a true unicorn, offering the best combination of cushioning and energy return of any foam on the marketre-engineered winged nylon plate provides reinforcement while maintaining flexibility