6105.90.80 - Other

This HTS category, 6105.90.80, encompasses knitted or crocheted shirts for men or boys that are not made from wool, fine animal hair, or silk/silk waste. It serves as a residual classification for shirts composed of "other textile materials" not specifically detailed in its sibling categories. These sibling categories, 6105.90.10.00 and 6105.90.40.00, specifically address shirts made from wool or fine animal hair, and those containing a high percentage of silk or silk waste, respectively.

Therefore, 6105.90.80 is applied to knitted or crocheted men's or boys' shirts made from a variety of other fibers, such as cotton, man-made fibers like polyester or nylon, or blends of these materials, provided they do not meet the specific material requirements of the preceding subheadings.

The subcategories under 6105.90.80 further refine classification based on specific trade restraints that may apply to certain textile materials. These include shirts subject to cotton restraints (6105.90.80.10), wool restraints (6105.90.80.20), and man-made fiber restraints (6105.90.80.30). The "Other" subcategory (6105.90.80.60) is for shirts within this broad category that are not subject to any of these specific restraints. The precise material composition and any applicable trade agreements are critical for accurate classification within these subdivisions.