Nike designed the Air Zoom Structure to help provide a speedy running shoe option for those that commonly pronate or roll inwards with each foot strike. A medial longitudinal arch helps to prevent common injuries such as medial ankle sprains, sinus tarsi syndrome or knee and hip pain. By aligning your foot strike you become more efficient with each step helping you to run further and reach your full potential. Nike has added Flywire cables to the 22nd edition of the structure that helps to secure the top of your foot as well as partial sleeves within the shoe that promote a snug, comfortable fit. Finally, Duralon blown rubber on the forefoot enhances cushioning leaving you with a stable ride that is responsive and long-lasting.