6212.10.30.00 - Containing 70 percent or more by weight of silk or silk waste

This HTS category, 6212.10.30.00, specifically classifies brassieres that are predominantly made of silk or silk waste. To qualify for this classification, the silk or silk waste content must constitute 70 percent or more by weight of the finished article. This detailed material composition is the primary criterion for distinguishing these brassieres from other similar items.

Within the broader classification of "Brassieres," this subcategory stands apart from its sibling, 6212.10.50, which covers "Other" brassieres. The "Other" category would encompass brassieres that do not meet the stringent silk content requirement, including those made from other natural fibers, synthetic fibers, or blends where silk is not the dominant material by weight.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Therefore, classification into 6212.10.30.00 hinges solely on the confirmed presence of 70 percent or more silk or silk waste by weight. This requires careful examination of the garment's composition to ensure accurate customs declaration.