Building upon the learnings of the previous models, the Endorphin Speed 3 has been refined to offer more support and increased versatility. The shape of the nylon plate in the Speed 3 has been updated to center your foot on landings and increase the energy return during the gait cycle. The same bouncy PWRRUN PB midsole foam is re-shaped to smooth out transitions and improve the spring felt underfoot. The upper of the Speed 3 has undergone changes, with a comfortable fit ready to tackle daily runs to races and everything in-between. The Saucony Endorphin Speed 3 is a fast and versatile running shoe packed with everything you need to pick up the pace in comfort.