The Endorphin Speed 5 sits at the sweet spot between a daily trainer and a race shoe — fast enough for race day, durable enough for regular training. A nylon plate embedded in PWRRUN PB foam delivers a snappy, propulsive ride that rewards a quick cadence, while a lightweight upper keeps you moving efficiently from start to finish. Whether you're racing a 5K or running a tempo workout, the Endorphin Speed 5 is built to make you faster.