NIKE Women's Free 5.0 2014 Woven mesh upper with innovative construction to be lightweight and durable: Provides optimum ventilation Dynamic Fit technology is achieved through Flywire technology integrated with the laces: Offers an adaptive, supportive fit No-sew overlays throughout the upper: Gives support and durability without added weight Low-profile, Phylite midsole that is tough enough to double as an outsole: Allow for a resilient ride and dramatically reduces the overall weight Hexagonal flex grooves are hot-knife cut into the midsole/outsole: Offers 6 different flex points for the ultimate in natural motion