Nike Flex 2017 RN Women's Running Shoe helps keep you light on your feet from st art to finish with an engineered mesh upper and lightweight, flexible outsole. Benefits Engineered mesh upper is breathable where you need it mostFlywire technology delivers midfoot lockdownDual-density foam midsole/outsole for lightweight comfortRounded heel promotes natural range of motionRubber pods at the toe and heel for durable tractionTri-star outsole pattern enhances flexibility