Free 4.0 Flyknit 'Black Fog'

The Nike Free 4.0 Flyknit is constructed with a seamless Flyknit upper in a series of grayscale tones. The lightweight, flexible design features Flywire cables on the eyelets, complementing the asymmetrical lacing system to help provide a locked-down fit. Flex grooves on the outsole provide an adaptable stride as well as a hit of bright green at the toe.