6212.90.00.50 - Containing 70 percent or more by weight of silk or silk waste

This HTS classification, 6212.90.00.50, specifically covers "other" articles of apparel and clothing accessories that are not knitted or crocheted, falling within the broader category of brassieres, girdles, corsets, braces, suspenders, garters, and similar articles and their parts. The defining characteristic of this particular subcategory is that the goods must contain 70 percent or more by weight of silk or silk waste. This material requirement is crucial for accurate classification, distinguishing these items from those made primarily of other fibers.

In comparison to its sibling categories, 6212.90.00.10 (cotton), 6212.90.00.20 (wool), and 6212.90.00.30 (man-made fibers), this classification is strictly for silk-based articles. The "Other" sibling category, 6212.90.00.90, would encompass articles not meeting the specific material composition of cotton, wool, man-made fibers, or the high silk content designated here. The primary distinction lies in the dominant fiber content, with this code isolating those where silk constitutes the overwhelming majority of the weight.

As this is a leaf node within the HTS structure, there are no further subcategories. Therefore, classification under 6212.90.00.50 relies solely on meeting the specified material composition. Importers and exporters must carefully verify the fiber content of relevant articles to ensure accurate declaration and compliance with customs regulations. Examples of items that would fall here, assuming they are not knitted or crocheted, include silk slips, silk-lined supportive garments, or parts of such items where silk is the predominant material.