adidas Performance Women's Energy Boost 2 W Running Shoe 100% Nylon Mesh Tech Fit/Textile Imported Rubber sole High mileage neutral, cushioned trainer with revolutionary boost midsole material with highest energy return properties on the market Tech fit stretch upper for socklike fit with welded overlays and cage striping for support Boost midsole for state of the art energy return and cushioning that will outlive any conventional ethylene vinyl acetate midsole Mid foot torsion bar for support and stability Adiwear outsole for lightweight durability with zone motion for increased traction and feel