6105.90.80.20 - Subject to wool restraints (438)

This HTS classification, 6105.90.80.20, specifically covers men's or boys' shirts that are knitted or crocheted, made from "other textile materials," and are subject to wool restraints. The "other textile materials" designation excludes common fibers like cotton and man-made fibers, directing classification to items primarily composed of wool or animal hair. The inclusion of "wool restraints" signifies that imports under this code may be subject to quantitative limitations or specific documentation requirements due to trade agreements.

Distinguishing this category from its siblings is crucial for accurate classification. While 6105.90.80.10 also falls under "other textile materials" for men's or boys' shirts, it is specifically subject to cotton restraints, indicating a different material composition or a specific trade agreement context. Similarly, 6105.90.80.30 pertains to man-made fiber restraints, and 6105.90.80.60 serves as a residual category for "other" shirts of this type not covered by specific restraints. Therefore, 6105.90.80.20 is precisely for wool or animal hair content shirts that are under specific import limitations.

As this is a leaf node, there are no further subcategories to explore. The classification is definitive for men's or boys' knitted or crocheted shirts composed of wool or animal hair and subject to specific import restraints. Importers should carefully verify the fiber content and consult relevant trade notices or regulations concerning wool restraints to ensure compliance when utilizing this HTS code.