Best for the mile-10k the Saucony Endorphin is comfortable lightweight racing spike thats tough enough to go the distance. Featuring a snug woven upper with seamless FlexFilm overlays the Endorphin delivers secure lockdown over the footbed without restricting your foots natural motion. The result A worry-free fit and ultra-fast feel. SSL EVA foam in the midsole cushions the blow of repeated impact while returning energy to every step and a four-spike Pebax outsole plate digs in and launches you forward with each stride. Woven upper with seamless FlexFilm overlays for a snug fit and lightweight support. SSL EVA midsole foam for light responsive cushioning with every step. Four-spike Pebax outsole plate for aggressive traction and acceleration. Includes 6mm pyramid spikes and a wrench. Shipping to Canada is restricted for this product.