6203.42.03.00 - 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, 6203.42.03.00, specifically covers men's or boys' trousers, bib and brace overalls, breeches, and shorts that are primarily constructed from cotton. A key defining characteristic of this category is that the garments must be designed and marketed as "recreational performance outerwear." This implies a focus on functional attributes such as breathability, moisture-wicking properties, durability, and comfort, intended for active outdoor pursuits or sports.

This category is distinguished from its sibling, "Of cotton: Other:", which would encompass men's or boys' cotton trousers, overalls, breeches, and shorts that do not meet the specific criteria of recreational performance outerwear. The distinction lies in the intended use and the presence of specialized technical features associated with performance garments, rather than general-purpose cotton bottoms.

As this is a leaf node in the HTS database, there are no further subcategories. Therefore, classification under 6203.42.03.00 depends entirely on the garment's material composition (primarily cotton), its type (trousers, bib and brace overalls, breeches, or shorts), and its designation as recreational performance outerwear, evidenced by design, construction, and marketing.