Fresh Foam X midsole foam with approximately 3% bio-based content delivers our most cushioned Fresh Foam experience for incredible comfort. Bio-based content is made from renewable resources to help reduce our carbon footprint. Supportive medial zone for stability to help reduce overpronation Engineered mesh upper for structure, support and breathability Synthetic upper material features no-sew overlays for a comfortable fit and feel 6 mm drop; due to variances created during the development and manufacturing processes, all references to 6 mm drop are approximate