12 mm drop: due to variances created during the development and manufacturing processes, all references to 12 mm drop are approximateFull grain leather upperISS® Internal Support System provides additional stabilityLightweight EVA (Ethyl Vinyl Acetate) midsole provides flexible lightweight impact absorptionMedial Post consists of higher-density compression-molded EVA, located on inside edge of shoe, to help prevent over-pronationOrtholite® foam insert delivers odor resistance, long term comfort, and superior breathability.