The Nike Wmns Free 4.0 Flyknit brings together advanced running tech and stylish, minimalist design. This 'Voltage Green' women's edition promotes varying degrees of stretch and support through a one-piece bootie rendered with a geometric pattern and Flywire lacing. A signature tongue logo and Swoosh reinforce heritage. With anatomical shaping, the Phylite midsole and flexible rubber outsole provide impact protection and responsiveness.