BusinessComfort Slip On LeatherAnatomically shaped for the best fit Light,highly breathable textile lining provides extra cushioning RemovableECCO Comfort Fiber System (CFS) insole CFSincreases air circulation for perfect inner climate and all day comfortDirect-injected, single-density PU light outsole Outsoleis extremely light and flexible with superior shock absorptionStylish slip on oxford for business or casual Uppermade of full grain leather Contains a metal shank