AfterPay Available - The Endorphin Speed 2 is a natural winner, and now it's back and better than ever. Runners love this shoe while training for race days and shaving time off their runs, no matter what the distance, 5K, 10K, half or full marathon, this shoe has it. Between its ultralight PWRRUN PB cushioning and responsive nylon plate, it's evident this shoe can do it all. From speed work to longer runs, from workouts to race day, it's more than ready.