A stylish choice for the runner seeking comfort, the 660 offers the New Balance patented ABZORB? cushioning technology for a smooth and soft ride that lasts mile after mile. Abzorb? cushioning in the heel for exceptional shock absorption. Medial Post consists of higher-density compression-molded EVA, located on inside edge of shoe, to help prevent over-pronation. Reflective detailing enhances your visibility.