Powerfit Comfort System uses a combination of ergonomically designed elements at key zones to supply movement and provide critical support - delivering maximum comfort all day long. * Premium waterproof leather with waterproof membrane for extreme abrasion resistance and dry feet * Electrical Hazard Protection meets ANSI Z41PT99, ASTM F2412-11, F2413-11 and ASTM F2892-11 standards to provide protection from open circuits. * Alloy safety toe for lightweight protection and a roomy fit * Internalized Anti-Fatigue Technology with conical geometry in polyurethane midsole to reduce shock and return energy