6207.19 - Of other textile materials:

This HTS category, 6207.19, encompasses men's or boys' underpants and briefs that are not primarily made of cotton. This designation signifies that the textile composition of these undergarments, when considered by weight, is predominantly other than cotton.

Distinguishing itself from its sibling category, 6207.11.00.00 (Of cotton), this classification serves to segregate undergarments based on their primary fiber content when that content is not cotton. This allows for more granular tariff application and statistical tracking.

The subcategories under 6207.19 further refine this classification based on specific fiber types or percentages. For example, 6207.19.10.00 specifically addresses items containing 70 percent or more by weight of silk or silk waste. The residual category, 6207.19.90, captures all other underpants and briefs that fall under the broader "other textile materials" description but do not meet the specific criteria for silk-based compositions.