NIKE Free 4.0 v2 Womens Running Shoes Liquid Lime/Reflective Silver-Dark Grey 511527-300-10 Modified mesh inner sleeve hugs the foot for a dynamic, sock-like feel Phylite midsole/outsole for a resilient ride and durable, lightweight cushioning Molded sockliner recreates the shape of the foot for enhanced comfort Deep Nike Free flex grooves for a natural range of motion