Created in partnership with Black Girls RUN! – the Endorphin Speed 4 BGR! celebrates health, fitness, wellness, community, and sisterhood. Designed as a race-day shoe, the Endorphin Speed 4 quickly proven itself much more, 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 cushioned running shoe provides the perfect balance of support, rebound and…