adidas Performance Women's Energy Boost W Running Shoe 100% Nylon Mesh Tech Fit/Textile Imported n/a Rubber sole Industry leading energy return and cushioning technology in the energy boost neutral trainer 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 Adiwear outsole for lightweight durability