For a smooth ride with every stride rev up your run with the Flex 2017 RN Running Shoe from Nike. One-piece engineered mesh upper in a running shoe style Dynamic Flywire cables for a supportive fit No-sew overlays for seam-free comfort Co-molded midsole with soft injected Phylon core foam Molded EVA sockliner enhances comfort Tri-star outsole pattern for maximum flexibility, Shoes, womens, athletic, running, sneakers