Details:The Endorphin series hits the road with the Endorphin Racer.  Built on a zero-drop platform, this ultra lightweight racing flat features a thin midsole for just the right amount of impact protection and a responsive ride to keep you pressing forward.  The outsole uses XT-LITE for increased traction that won't weigh you down, while FLEXFILM overlays along the upper create a snug fit to deliver the performance you need on race day.