NIKE Women's Air Zoom Structure 19 Flash - Running Shoes All-over multi-color reflectivity: Enhances visibility in low light 3-layer mesh starts with a base of tightly woven mesh, covered with a 2nd layer of reflective film: Acts as a barrier to repel water Dynamic Fit technology is achieved through Flywire cables integrated with the laces: Offers an adaptive, supportive fit ull mesh inner sleeve: Wraps the foot to enhance breathability and provide a sock-like fit Triple-density foam midsole with Dynamic Support platform: Provides excellent stability