Built for 3-10k distances, the Saucony Endorphin is light and fast enough to power you across the finish. Breathable, open mesh upper with Flex Film overlays for a lightweight, supportive fit. SSL EVA midsole for durable, lightweight cushioning. Pebax four-spike plate for traction that propels you forward. Includes 6mm pyramid spikes and a wrench. 3.0 oz.