The Endorphin Pro was engineered with elite athletes and built to give everyday runners a fair advantage at the starting line. Featuring the signature S-curve carbon fiber plate for powerful transitions, along with ultralight and springy PWRRUN PB cushioning, the resulting speed roll propels you forward with a feeling of continuous momentum that blurs the line between each stride. And weighing in at a feather-light 7.5oz, it's undeniable. They were made for smashing them.