Blundstone Men's 940 Riggers Safety Boot Leather Imported Synthetic sole Shaft measures approximately 10.5" from arch Heel measures approximately 1.5" Platform measures approximately 1" Boot opening measures approximately 15.5" around Chestnut premium water resistant leather pull on high leg riggers safety boot. Moulded TPU toe guard for added leather protection. Breathable, moisture wicking lining. Low density Polyurethane midsole. High density Nitrile rubber outsole - 5mm extra heavy duty tread - excellent cut and slip resistance, impervious to hydrolysis and microbial attack - heat resistant to 572F - oil, acid & organic fat resistant. Steel shank for maximum torsional stability. Broad fitting 200 joule impact resistant Type 1 steel toe cap. Blundstone Shock Zone polyether PU footbed featuring a channelled air flow system and cushion lining. SPS MAX-PORON in the heel strike zone for increased shock protection.