Acid and oil resistant Oarprene base. Acid and oil resistant Neoprene Upper. Leather reinforced, rust resistant D-ring lacing system. Acid and oil resistant lace and stitching throughout. -100°C/-148°F comfort rated inner boot system. Microcellular waffle foot-bed traps air and moisture. GelFlex fatigue resistant midsole. Aggressive, long wearing, self-cleaning outsole design. Protective Safety Toe and Plate. CSA / ASTM approved. ESR / EH rated.