Design: Lightweight synthetic upper open mesh panels for ventilation In-Shoe Comfort: EVA sockliner provides extra cushioning and rebound One-piece Micro G(R) foam midsole turns cushioned landings into explosive takeoffs Durability & Traction: 3/4 Length Pebax(R) cleat plate is ultra-strong, flexible and lightweight for explosive propulsion Removable 6-pin spike outsole gives you perfect traction to accelerate and maintain top speeds Additional Details: Designed for sprint events Weight: 6.5 oz. 1/4"" pyramid spikes