6110.90.10.30 - Men's or boys' (759)

This HTS classification, 6110.90.10.30, specifically covers knitted or crocheted vests, for men or boys, that are made from textile materials other than those explicitly listed in prior subheadings. The key characteristic is that these vests must contain 70 percent or more by weight of silk or silk waste. This category excludes other types of knitted or crocheted garments such as sweaters, pullovers, and sweatshirts, as well as sweater vests.

The primary distinction from its sibling category, 6110.90.10.40, lies in the intended wearer. While both fall under the umbrella of knitted or crocheted vests made predominantly of silk or silk waste, this specific subheading is exclusively for items designed for men or boys, whereas the sibling category is for women's or girls' garments.

As this is a leaf node within the HTS structure, there are no further subdivisions. Therefore, classification within this code hinges directly on meeting the criteria of being a knitted or crocheted vest, intended for men or boys, and composed of at least 70% silk or silk waste by weight. Practical examples would include knitted silk tank tops or sleeveless shirts worn as outerwear or as a base layer by male individuals of any age group.