An Alaskan staple in the commercial fishing industry, these boots will give you flexible, all-day comfort and the best protection against the broadest range of acids, corrosives, and contaminants. Each boot is made with XTRATUF's signature triple dipping technique, which creates a seamless barrier that is highly resistant to many organic and inorganic acids, chemicals and contaminants. Their latex neoprene is ozone resistant, and is softer, lighter, and far more pliable than ordinary rubber. Cushioned insoles with arch support help fight fatigue and stress on the legs and back. This Steel Toe version meets ASTM F2413-18 M/I/C EH and Canadian Standard CSA Z195-14 for added protection. Recommend half sizes order up Triple-Dipped Shells for Extra Tough, Extra Watertight Protection Hand-Layered Construction Adds Flex and Strength at Critical Stress Points Open Cell Foam FootbedInsoles reduce moisture and add comfort Slip-Resistant Non-Marking Outsole Steel Toe meets ASTM F2413-18 M/I/C EH and Canadian Standard CSA Z195-14 100% Waterproof Viral Penetration Resistant per ASTM F1671 / F1671M - 13 Approximately 5.15lbs Recommended temperature rating to -10°F Shaft circumference is 16 inches and was taken from a size 9. There may be slight measurement variations based on size. XTRATUF Men's 15" Steel Toe Legacy Boot 22271G