6101.90.10.00 - Containing 70 percent or more by weight of silk or silk waste (734)

This classification covers men's or boys' outer garments, knitted or crocheted, that are specifically constructed with a high silk content. The defining characteristic for this category is that the article must contain 70 percent or more by weight of silk or silk waste. Examples include knitted silk overcoats, carcoats, capes, cloaks, anoraks, windbreakers, and similar outerwear designed for warmth or protection.

This particular subcategory is distinct from its sibling, 6101.90.05.00, which is designated for knitted or crocheted outerwear made primarily of wool or fine animal hair. The key differentiator lies solely in the primary textile fiber composition. All garments classified here must meet the 70% silk threshold, whereas those in the wool or fine animal hair category will be predominantly composed of those materials.

As this is a leaf node within the HTS, there are no further subcategories to introduce. The classification is finalized at this level based on the knitted or crocheted nature of the garment, its function as outerwear, and the explicit 70% silk or silk waste content. Any knitted or crocheted men's or boys' outerwear not meeting this specific silk composition would be classified under the "Other" category, 6101.90.90.