6210.40.29.17 - Trousers, breeches and shorts (747)

This HTS subheading specifically classifies men's and boys' trousers, breeches, and shorts that are constructed from fabrics of heading 5602, 5603, 5903, 5906, or 5907, and further refined as recreational performance outerwear. The defining characteristic of this category is its fiber content, requiring the garment to have 70 percent or more by weight of silk or silk waste. This material composition is crucial for distinguishing these garments from other types of outerwear within the broader categories of men's and boys' garments.

When classifying garments under heading 6210, it is essential to differentiate them from other items. For instance, while sibling categories like "Overalls and coveralls" (6210.40.29.18) and "Other" (6210.40.29.19) exist at this level, this specific subheading focuses exclusively on trousers, breeches, and shorts. The "Other" category would encompass any men's or boys' garments meeting the fabric and performance outerwear criteria but not falling into the more specific classifications of trousers, breeches, shorts, overalls, or coveralls.

As this subheading represents a leaf node in the HTS structure, there are no further subdivisions. Therefore, the focus for classification rests entirely on accurately identifying garments as trousers, breeches, or shorts, confirming their construction from the specified headings of synthetic or regenerated textile materials, verifying their status as recreational performance outerwear, and most critically, ensuring they meet the stringent 70 percent by weight silk or silk waste content requirement. Examples of such items could include high-end silk blend cycling shorts or silk-lined wind pants designed for athletic activities.