HTS code 9902.14.37 covers "Footwear for men, with vulcanized uppers of neoprene measuring 7 mm in thickness, covered with a polyester knit fleece on the interior and coated with rubber on the exterior, such footwear measuring in height (from the base of the inner sole to the top of the upper) 20.32 cm or more but not over 25.4 cm, with a cemented rubber sole; the foregoing waterproof, valued per pair at $40 or higher, with each boot having a slit in the top of upper collar designed to allow boot to be affixed to a fishing wader (provided for in subheading 6404.19.20)" under the US Harmonized Tariff Schedule. This is the official duty rate charged by US Customs when this product is imported into the United States, sourced directly from the U.S. International Trade Commission and refreshed daily.