Designed for optimal mobility and comfort, the Nike Flex 2017 RN 'Black Anthracite' sneaker is a superior running shoe for extended workouts and training. A breathable, circular-knit textile covers the upper, equipped with synthetic overlays. Flywire cables wrap around into the laces for stabilizing support. The thin molded footbed, Phylon midsole and tri-star outsole team up to deliver superior flexible durability and cushioning.