6204.63.50.00 - Containing 15 percent or more by weight of down and waterfowl plumage and of which down comprises 35 percent or more by weight; containing 10 percent or more by weight of down

This HTS classification covers trousers, bib and brace overalls, breeches, and shorts for women or girls that are specifically made from synthetic fibers. The defining characteristic of this subcategory is their filling, which must contain 15 percent or more by weight of down and waterfowl plumage, with down itself constituting at least 35 percent of that plumage. Additionally, a broader requirement of containing 10 percent or more by weight of down applies to these garments.

This specific classification is distinguished from other "Other" categories within "Of synthetic fibers" by the stringent requirements regarding down and waterfowl plumage content. While other "Other" categories might encompass a wider range of synthetic fiber garments without specific filling mandates, this node targets those with a substantial and precisely quantified down/plumage composition, indicating their use in insulated or specialized outerwear.

As this is a leaf node in the HTS structure, there are no further subcategories. Therefore, the focus for classification within this code is on verifying that the garment meets all specified material composition requirements, particularly the percentage of down and waterfowl plumage by weight. Importers should ensure their documentation accurately reflects these material details to ensure correct customs declaration.