So much technology, so little shoe. We’ve redesigned the look of our most popular shoe, but kept the fit, feel and ride consistent with its predecessor. The upper now features FlexFilm™, a strong yet pliable material innovation that adapts to your foot and provides a lightweight, seamless feel. Inside the shoe, anatomically-contoured memory foam heel pods secure a perfect fit. In the midsole, ProGrid™ technology provides a unique blend of responsiveness and cushion, and the heel crashpad has been beveled for an even smoother ride as the runner transitions through the gait cycle. Finally, after examining wear patterns on hundreds of test shoes, the outsole was upgraded through the addition of placements of carbon rubber for enhanced durability.