Blundstone Work Series 140 100% Leather Imported Synthetic sole Shaft measures approximately 4.5" from arch Heel measures approximately 2" Boot opening measures approximately 10" around Stout brown premium water resistant leather upper, elastic side safety boot Polyurethane midsole, thermo urethane (tpu) outsole - 6millimetertread - oil, acid and organic fat resistant - highly resistant to abrasion, hydrolysis and microbial attack - heat resistant to 140 degreec Broad fitting 200 joule impact resistant type 1 steel toe cap comfort system Luxury polyurethane footbed with arch support and the revolutionary poronxrd which provides extra cushioning and absorption redirection of shock with every step taken. The footbed is also anti-bacterial, breathable and washable Steel shank for maximum torsional stability