6208.99.30 - Containing 70 percent or more by weight of silk or silk waste

This HTS classification, 6208.99.30, specifically addresses women's or girls' undergarments and similar articles that are not knitted or crocheted, and are made primarily of silk or silk waste. The defining characteristic of this category is that the textile material must contain 70 percent or more by weight of silk or silk waste. This covers a range of intimate apparel and sleepwear, such as slips, petticoats, briefs, panties, nightdresses, and pajamas, provided they meet the silk content threshold.

The distinction of this subcategory lies in its material composition. It is nested under "Of silk or silk waste" which itself is a branch of "Of other textile materials" within the broader category of women's or girls' singlets and similar articles. This means that other articles in the 6208.99 range, particularly the sibling category 6208.99.50 "Other," would encompass garments made from textile materials other than silk or silk waste.

The subcategories under 6208.99.30 further refine the classification based on the specific type of garment. The existence of subdivisions like "Bathrobes, dressing gowns and similar articles" and "Other" indicates that for goods falling within the silk content criteria, a further distinction is made between specific types of loungewear and other articles not explicitly defined as bathrobes or dressing gowns. This allows for more granular reporting and tariff application.