High chemical and abrasion resistance |NBR rubber for maximum chemical protection|Oil-, chemical-, and slip-resistant NBR sole|Reinforced backstay for heel/tendon protection |Steel shank and air cushioned sole pockets|Adjustable nylon guard keeps out water and debris|AMC socks (VF22) included|Air moisture control socket for comfort|Heavy-duty cotton canvas lining|Ultra flexible: Exceeds 305,000 Flex Rating