Embroidered Flight Wire—think of the braided cables that support bridges—wrap around the shoe's upper to keep your feet secure and contained. Geared for Quickness Full-length Formula 23 foam translates to responsive support for your entire foot, helping you find new ways to create space. Under the foam, a stabilizing plate helps you feel quick when Euro-stepping through the lane. Step Back With Confidence A rubber wrap built for ankle support compliments an efficient traction system designed to optimize Luka’s step-back—and yours, too.