[Stay Healthy: This product received the American Podiatric Medical Association (APMA) Seal of Acceptance awarded to products found by the Association to promote good foot health. Stay comfortable and cushioned with Altra EGO FLO supercritical midsole foam for a lightweight and soft underfoot feel. A rocker shape is designed to give the feeling of being propelled forward with each step and provides an efficient toe-off without taking away from your natural stride.]