The Endorphin Pro is here, the fastest shoe Saucony has ever built. PWRRUN PB, their lightest and springiest cushioning ever, is combined with their signature S-curve carbon fibre plate to create a springboard effect. SpeedRoll technology continuously propels you forward, creating the feeling of continuous momentum and making running faster feel easier. These shoes weren’t made for chasing personal bests. They were made for smashing them.