6107.19.10.00 - Containing 70 percent or more by weight of silk or silk waste (752)

This HTS classification, 6107.19.10.00, specifically covers men's or boys' underpants and briefs that are knitted or crocheted and are composed of 70 percent or more by weight of silk or silk waste. This category is distinct from its sibling, 6107.19.90.00, which encompasses underpants and briefs of "other textile materials" not meeting the silk content threshold. The defining characteristic for this subcategory is the predominant silk composition, which dictates its placement within the broader classification of men's or boys' undergarments.

As a leaf node, this classification does not have further subcategories. Therefore, the focus for classification under this code rests solely on the confirmed presence of silk or silk waste as the primary material component by weight in the knitted or crocheted underpants and briefs. Importers and exporters should ensure accurate weight-based analysis of material composition to correctly apply this tariff code, distinguishing it from undergarments made from other natural or synthetic fibers, or those with a lower silk content.