Brand new in original box Flyknit upper delivers durable yet lightweight flexibility. Stretch-woven sleeve provides a sock-like fit Firm rubber in the heel provides durability and stability Synthetic overlays in high-wear areas such as the toe and lateral side enhance durability Molded flex grooves in the forefoot allow your foot to move naturally Flywire technology integrates into the laces at the midfoot for a dynamic fit that helps keep your foot in place without restricting natural movement