Air mesh upper - Allows air to permeate the interior keeping the foot cool. Abrasion resistant synthetic overlays - Provides support and stability without restricting natural movement. Sock-like fit - Wraps around the ankle for a secure feel. 3D molded collar and new heel notch design - Maintain a comfortable, secure fit. Molded EVA midsole with SprintFrame - Helps stabilize your foot and adapts to your motion.