6203.41.03 - Trousers of worsted wool fabric, made of wool yarn having an average fiber diameter of 18.5 microns or less

This HTS classification covers trousers specifically made from worsted wool fabric, where the wool yarn has an average fiber diameter of 18.5 microns or less. This designation implies a finer grade of wool, often associated with high-quality suiting and more refined garments. The classification falls under men's or boys' suits and separate trousers, excluding swimwear and knitted or crocheted items.

Within the broader category of "Trousers, breeches and shorts: Of wool or fine animal hair: Recreational performance outerwear: Other," this specific code differentiates itself by its material composition and the specific yarn fineness. The "Other" sibling category, 6203.41.06, would encompass trousers of wool or fine animal hair that do not meet the stringent criteria of an average fiber diameter of 18.5 microns or less, or are not classified as recreational performance outerwear.

The subcategories under 6203.41.03 further refine the classification based on the intended wearer. Specifically, 6203.41.03.10 pertains to trousers designed for men, while 6203.41.03.20 pertains to trousers designed for boys. This distinction is crucial for import and export declarations, ensuring accurate tariff application based on the garment's sizing and intended market.