The adidas Sprintstar delivers lightweight lockdown and explosive speed ideal for sprint events up to 400m. Reinforced mesh upper for durable breathability. SPRINTWEB synthetic overlays in the forefoot locks the foot in place for a snug, secure fit. Soft collar around the ankle reduces pressure on the Achilles. Stiff Pebax outsole plate quickly snaps the foot from heelstrike to toe-off for a faster, more explosive stride. Includes 1/4" pyramid spikes and a wrench.