Nike Free 5.0 Flash Running Women's Shoes mesh Rubber sole Lightweight mesh coupled with dynamic Flywire technology offer a breathable and secure lock down while seamless inner sleeve 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 six directions of motion providing the most flexible outsole to date. Strategically placed rubber lugs for added durability.