Waxed Nubuck leather upper. Sturdy 360° stitch welt construction for stability. Advanced 3-zone Aerospacer® lining with breathable cushion layer keeps feet dry and comfortable while preventing mildew. Removable triple density footbed for maximum cushioning and stability. Tough, lightweight polyurethane midsole. Fiberglass shank stabilizes foot, weighs 75% less than steel and reduces fatigue. Steel toe rated ASTM F2413-05 M I/75 C/75 EH.