This elite-level super shoe delivers soft, responsive cushioning that absorbs impact, maximizes efficiency, and helps you feel your best, so you reach the finish line. Ideal for everyday runners with marathon target times of about four hours or more. Design: Impact protection and high energy return Ultralight and breathable mesh upper Heel cushioning for secure comfort over long distances Supportive upper molds and adjusts to your foot's movements In-Shoe Comfort: Double layer of Heliona" HF hyper foam for maximum energy return and comfort Glass fiber-infused SpeedboardA(R) for efficiency and support Additional Details: Best for: Marathon, Competition, Running, Road running Heel-to-toe drop: 8mm