Pure Boost 2.0 ShoesThese men's running shoes feature boostâ„¢ in the midsole for endless energy return mile after mile. A mesh upper and lining provide maximum breathability.boost™'s energy-returning properties keep every step charged with an endless supply of light, fast energyAir mesh upper for maximum breathabilityMesh lining for breathable comfortRubber outsole provides push-off tractionImported