No job is too tough for The Original Muck Boot Company's Men's Chore Classic Met Guard Steel Toe safety work boot. Perfect for wider calves, this waterproof boot is triple-reinforced in the toe and quadruple reinforced in the heel for ultimate durability. The built-in breathable mesh lining will keep your feet ventilated during your entire day. With a blown rubber outsole, this oil-resistant and shock absorbent boot delivers the comfort you need to tackle any job. - 100% Waterproof, 100% Muckproof - 5mm Neoprene bootie - Breathable mesh lining - Triple toe and quadruple rubber heel reinforcement - Easy to clean, durable rubber overlays and sole - Steel shank - Internal Xrd metatarsal guard for extreme impact protection - Meets Astm F2413-18M/I/C Eh Mt - Comfort Range: Sub Freezing to 65°F / 18°C - Estimated calf circumference: 16. 5 in. - Estimated shaft height: 16 in..