6207.19.10.00 - Containing 70 percent or more by weight of silk or silk waste (752)

This HTS category, 6207.19.10.00, specifically classifies men's or boys' underpants and briefs that are composed of 70 percent or more by weight of silk or silk waste. These garments are intended for use as underwear, typically worn directly against the skin. The key defining characteristic for classification within this subcategory is the predominant silk content.

This classification is distinguished from its sibling category, 6207.19.90, which covers underpants and briefs made from other textile materials. Therefore, any men's or boys' underpants and briefs not meeting the 70% silk or silk waste threshold would fall under the "other" designation. The focus here is solely on the material composition, differentiating silk-rich undergarments from those made of cotton, synthetic fibers, or other natural or man-made materials.

As this is a leaf node in the HTS classification structure, there are no further subcategories. The classification is definitive for underpants and briefs of men's or boys' cut that meet the specified silk content criteria. When classifying, it is crucial to verify the percentage of silk or silk waste by weight to ensure accurate assignment to this code.