This wellington boot is made for hard work and designed to last. Chemical and oil resistant Phoenix outsole SPR leather upper protects against caustic alkali, sulfuric acid, calcium hydroxide, potassium phosphate and caustic potash Molded PU midsole CC5 Comfort Core removable PU insole Steel shank ASTM F2413 protective toe classification ASTM F2413 electrical hazard standard Georgia waterproof system Georgia Boot Men's 12 Inch ST Muddog Wellington