The Blundstone BL179 offers the ultimate protection with its steel toe design, heat resistant, and reliable slip-resistant outsole to keep you safe in a variety of work environments. ; Part of the Xtreme Safety series. ; Premium oil tanned leather upper. ; Elastic gore on sides for easy on and off. ; Nonmetallic PU midsole is penetration resistant. ; Shock Protection System (SPS) disperses shock at the heel strike and reduces skeletal stress on the feet, knees, and vertebrae. ; Extra-heavy duty rated. ; Xtreme comfort PU/foam removable footbed with PORON XRD forepart inserts. ; Broad-fitting toe cap. ; Oil and acid-resistant outsole. ; Sole is resistant to organic fats and oils. ; Outsole is heat resistant to 290°F. ; Slip-resistant thermo urethane outsole is highly resistant to hydrolysis and microbial attack. ; Steel-toe meets ASTM 2413-11 M I/75 C/75 EH PR standard specifications for performance requirements for foot protection. Measurements: ; Weight: 1 lb 12 oz ; Circumference: 11 in ; Shaft: 5 1 2 in ; Product measurements were taken using size AU 10.5 (US Men's 11.5), width Medium. Please note that measurements may vary by size.