6104.69.40 - Containing 70 percent or more by weight of silk or silk waste

This HTS classification pertains to knitted or crocheted trousers, bib and brace overalls, breeches, and shorts for women or girls that are specifically composed of textile materials other than artificial fibers. The defining characteristic for this category is the fiber content: the garment must contain 70 percent or more by weight of silk or silk waste. This material composition is crucial for distinguishing these items from other categories within the "Of other textile materials" subheading.

While other categories at this level, such as "Of artificial fibers," focus on different primary material compositions, this specific category exclusively addresses garments where silk or silk waste constitutes the dominant component by weight. This ensures that items crafted primarily from silk are correctly identified and differentiated for customs purposes, reflecting the unique properties and potential trade implications associated with silk textiles.

Within this classification, further subdivisions exist to specify the exact type of garment. The subcategories distinguish between "Bib and brace overalls" and "Trousers, breeches and shorts." This granular breakdown allows for precise classification based on the garment's design and intended use, facilitating accurate duty assessment and trade statistics.