6204.63.01.00 - 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, 6204.63.01.00, specifically covers trousers, bib and brace overalls, breeches, and shorts for women and girls that are made of synthetic fibers. A key defining characteristic of this category is its composition of at least 15 percent by weight of down and waterfowl plumage, with down comprising 35 percent or more of that plumage. Additionally, the garment must contain at least 10 percent by weight of down overall. These criteria designate the garments as "recreational performance outerwear," implying a focus on insulation and weather resistance for athletic or outdoor activities.

This category is distinguished from its sibling category, "Other," which would encompass synthetic fiber trousers, bib and brace overalls, breeches, and shorts that do not meet the specific down and plumage content requirements outlined for this classification. Therefore, the presence and significant percentage of down and waterfowl plumage is the primary differentiating factor.

As this is a leaf node within the HTS structure, there are no further subcategories for this specific item. Classification at this level is definitive, based on the material composition, garment type, and intended use as recreational performance outerwear. Examples within this classification would include insulated ski pants, snowboarding bibs, or outdoor hiking trousers designed for cold weather, all manufactured primarily from synthetic fibers and meeting the stringent down content thresholds.