16 inch Purofort Boots Steel Toe Size 7 Order # 5452607 Size 8 Order # 5452608 Size 9 Order # 5452609 Size 10 Order # 5452610 Size 11 Order # 5452611 Size 12 Order # 5452612 The Purofort™ exterior is not only strong but also extremely lightweight. Made of CFC-free water-blown polyurethane, the boot is lighter and more durable than PVC. This boot provides a greater range of movement and is resistant to oil, fat, fuel and other petrochemicals. The molecular structure provides thermal insulation to keep feet warmer when it’s cool, and cooler when it’s warm. A shock absorbent heel and removable cushion insole provide all-day comfort while the ASTM F2413-05 M I/75 C/75 EH standard steel toe provides jobsite protection. The cleated outsole is both oil and slip resistant.