Soft leather upper for great support and flexibility.Visible Rearfoot Grid System consists of a woven configuration of Hytrel™ filaments which provide cushioning and stability by centering the heel on impact.Forefoot HRC(High Rebound Compound)is a responsive EVA/rubber compound which provides cushioning through the later stages of the gait cycle.HRC Strobel Board.Midfoot Support Bridge.Removable, premium sockliner.SRC Impact Zone.Rubber outsole.Measurements:Weight: 13 ozProduct measurements were taken using size 9. Please note that measurements may vary by size.