Finish first and in style with the Saucony Endorphin MD 4 track spike. Designed for mid-distance races, this spike features a six-spike Pebax® plate for aggressive and reliable traction. SSL EVA midsole cushions your step and increases rebound so you can perform at your best. FlexFilm upper with lightweight mesh for a breathable, seamless fit. Wt. 2.8 oz.