Women's Endorphin Pro 4 RaceDay Running Shoes Saucony US Women's Endorphin Pro 4 Running Shoes Saucony Women's Endorphin Pro 4 in Magenta Women's Performance Running Shoes Saucony Endorphin Pro 2 Royal (Women's) S10687 30 GB. Born from speed The Endorphin Pro 2 was designed to help you step up your race pace one step at a time A superior fit and more heel support mean you can keep your eye on the finish line And with our ultralight PWRRUN PB and a carbon fiber plate there? s no doubt you? ll get there faster than ever before