Brooks Women's Ariel-W 100% Synthetic Rubber sole Brooks DNA cushioning adapts to the pressure of your foot, dispersing impact for softer steps. Eco-friendly BioMoGo midsole provides superior cushioning and support. Extended Progressive Diagonal Rollbar helps minimize pronation (foot rolling inward). Mesh / synthetic leather upper, polyester mesh upper lining, brushed polyester sockliner... Polyurethane foam insole, EVA midsole, thermoplastic polyurethane shank, rubber outsole.