Womens SAUCONY ENDORPHIN SPEED :: Roll forward faster from speed work to race day in the allnew Womens Saucony Endorphin Speed. Feel constant momentum with new ultralight and springy PWRRUN PB cushion powered by a nylon plate (more flexible than carbon fiber) snapping back to push you on. Go faster, not harder with elevated foam and a firmer forefoot creating responsive SPEEDROLL instantly. Pass your PR with FORMFIT giving the Endorphin Speed the most personalized fit ever by Saucony.