NIKE Men's Free 5.0 Running Shoe Black/Anthracite/White Size 15 M US mesh Lightweight meshes coupled with dynamic Flywire technology offer a breathable and secure lock down while seamless inner booty gives a plush and comfortable fit. Flex grooves within the Phylon midsole allow the foot to move naturally in multiple directions. New Flex pattern offers 6 directions of motion providing the most flexible outsole to date. Strategically placed rubber lugs for added durability.