Designed for efficient power and technical sprinters, adidas Sprintstar Spikes help get athletes to the finish line with speed and proficiency. The feet will feel secure and you’ll feel prepared for the race. Recommended for 60m, 100m, 200m, 400m, 4x100, and 4x400m events. Upper: SPRINTWEB forefoot designed to lock the foot down during event-specific motions. Reinforced mesh upper offers maximum heat exchange with outside elements. Synthetic overlays designed to hold the foot securely during all phases of the sprinting gait.Midsole: Soft collar around the ankle reduces pressure on the ankle and Achilles during the sprinting motion. Outsole: Pebax plate provides optimum energy return and durability.