Per Nike: The Free Flyknit Chukka integrates the second skin-like fit of Nike Flyknit and feather-light support of Nike Flywire with the barefoot feel of Nike Free for the ultimate everyday shoe. Featuring the same Nike Sportswear-specific outsole as the Nike Free OG and Breathe, the Nike Free Flyknit Chukka delivers the classic Nike Free feel for both men and women.