6109.90.15.30 - Underwear (459)

This classification, HTS Code 6109.90.15.30, pertains to women's or girls' underwear garments knitted or crocheted from textile materials other than cotton or synthetic fibers, specifically when constructed with long sleeves and made of wool. These items are designed for intimate wear and fall under the broader category of T-shirts, singlets, tank tops, and similar garments. The key defining characteristic for this specific subcategory is the combination of being women's or girls' underwear, having long sleeves, and being composed of wool.

This category is distinguished from its sibling, 6109.90.15.40 ("Other"), by its precise material composition and sleeve length. While the "Other" category would encompass similar knitted or crocheted women's or girls' underwear made of non-cotton/non-synthetic fibers but lacking the specific long-sleeved wool construction, this code is reserved solely for those items that meet all three criteria: wool material, long sleeves, and women's/girls' underwear designation.

As a leaf node, this classification does not have further subcategories. Therefore, the primary focus for classification within this code is the meticulous verification of the garment's intended use as underwear, its knitted or crocheted construction, the presence of long sleeves, and the definitive use of wool as the primary textile material, specifically for women's or girls' garments.