COMFORTcushion PU/PORON Impact Absorption System - reduces leg and lower back fatigue Fully lined with padded comfort collar and tongue Lightweight footwear designed for all day comfort Lightweight SPORTflex dual density Thermo Plastic Urethane (TPU) sole, heat resistant to 130? Celsius and resists exposure to most acids and chemicals Water resistant nubuck leather with white trim Wide profile NATUREform Type 1 steel toe cap, with comfort liner