Step up to the challenge with a lightning-fast performance in our lightweight, durable ULTRA 4.1 FG/AG. This is your go-to boot for speed and agility when the pressure is really on. It boasts a bold look with an embossed and printed PU upper to support explosive bursts of speed. This is fused to a running spike-inspired SpeedUnit outsole, engineered for rapid acceleration. Welcome to a new era of fast.