The Elite Collection is designed to provide the protection and durability of a Legacy boot but with an unmatched comfort for long days at sea or long hours on the dock. Using RDR Rubber, an oil/chemical resistant compound, this boot is resistant to many organic and inorganic acids, oils, chemicals, and contaminants. The Elite boot is built with a 4-way stretch mesh covered 5mm neoprene bootie, this allows the boot to be comfort rated to -20F. 100% Waterproof 4-way stretch mesh high abrasion nylon for added durability 5mm neoprene bootie adds warmth and comfort Approximately 5.4lbs Breathable airmesh lining oil chemical resistant Please note this product is sized for men. Women should size 1.5 to 2 sizes down RDR Rubber will outwear standard rubber boots in solvents, caustics, hydrocarbons, oils, fats, and acids Recommend half sizes order up Recommended temperature rating to -20°F Reinforced rubber layers for durability Shaft circumference is 13 inches and was taken from a mens size 9. There may be slight measurement variations based on size. Slip-resistant non-marking chevron outsole