6205.90 - Of other textile materials:

This HTS category, 6205.90, encompasses men's or boys' shirts that are not knitted or crocheted and are manufactured from textile materials other than cotton, man-made fibers, wool, fine animal hair, or silk. The defining characteristic for classification under this heading is the material composition of the garment.

Compared to its sibling categories, 6205.20 (Of cotton) and 6205.30 (Of man-made fibers), this category acts as a residual classification. It applies to shirts made from any other textile material, ensuring comprehensive coverage within the men's and boys' shirts chapter. For instance, shirts made from linen, ramie, jute, or blends where no single other fiber type predominates and qualifies for a specific category would fall here.

The subcategories within 6205.90 further refine classification based on specific "other" textile materials. The existence of subdivisions like "Of wool or fine animal hair" and "Of silk or silk waste" (if applicable at this level) or a general "Other" category like 6205.90.40 highlights the need to meticulously identify the primary textile fiber content for accurate customs declarations. This ensures that shirts made from less common or specialized textile fibers are correctly categorized and assessed.