The Mizuno Geo-Silencer 2 track shoe is recommended for distances from 400 meters to 1600 meters and hurdles. Synthetic leather upper is comfortable and supportive. Fit Straps help increase power through an enhanced fit. AP midsole is made with a lightweight and responsive yet durable cushioning copolymer. Full-length, elite-level, middle distance spike plate promotes power by providing superior traction and minimizing energy loss. Wt. 5.8 oz.