Durable full-grain or oiled nubuck leather uppers. Michelin's exclusive Advanced Rear Suspension (ARS) providing shock absorption with every heel strike. An Advanced non-marking Michelin HydroEdge outsole that is oil and slip-resistant. Guranteed Waterproof Construction. Full Length Lenzi insole is lighter and more flexable than steel, yet fully meets ASTM requirements for puncture resistance. Composite Toe is lighter than steel and fully meets ASTM standards for impact and compression resistance. Electrical Hazard.