New condition ( worn once for a 3k time trial on a track) The Saucony Endorphin Pro 2 is a carbon fiber racing shoe designed to make running at top speed feel easier so you can get to the finish line faster. Designed for athletes chasing new personals bests, the Endorphin Pro 2 is Saucony’s most innovative road racing shoe. The Saucony Endorphin Pro 2 combines a stiff carbon-fiber plate, soft but responsive cushioning, and an upgraded upper to create a shoe that is ready to take on the best in distances ranging from 5k up to the marathon.