Nike Dunk Low A SMOOTH, STABLE RIDEThe Nike Air Zoom Structure 19 (2015 Chicago Marathon) Women's Running Shoe is designed with a triple-density midsole and lightweight Flymesh upper for superior cushioning, support and breathable comfort. A Nike Zoom unit delivers low-profile impact protection, and deep flex grooves allow for natural range of motion.BenefitsTriple-density foam midsole with dynamic support platform provides excellent stabilityFlywire cables enhance lockdown and create a glove-like fitFlymesh upper for targeted ventilation and supportForefoot Nike Zoom Air unit for low-profile impact protection and responsivenessWaffle rubber outsole for durability and multi-surface tractionProduct DetailsCrash rail with segmented rubber absorbs impact for a smoother transitionFull mesh inner sleeve for enhanced breathability and a sock-like fitFlex grooves for a more natural, efficient strideSignature details pay tribute to a famous footrace