Mens work boots Stout Brown premium water resistant leather upper, elastic side safety boot Polyurethane midsole. Thermoplastic polyurethane (TPU) outsole highly resistant to hydrolysis and microbial attack 6mm tread—oil, acid & organic fat resistant Heat resistant to 284˚F SPS Max - XRD® Technology in the heel and forepart strike zones for increased impact protection Steel shank—ensures correct step flex point, assists with torsional stability Reinforced stitching Electrical hazard resistant Broad fitting impact resistant steel toe cap