Description Designed for elite sprinters, our FuelCell SuperComp PWR-X includes groundbreaking features to support your fastest runs. These racing spikes have a FuelCell midsole that offers a high-rebound feel, designed to promote energy return for sprinting events. The full-length carbon fiber plate offers a stiff and responsive underfoot feel with built-in pins for lightweight but powerful traction. Plus, the ultra-lightweight woven upper delivers a sleek fit that helps you feel fast on your feet.