6205.90.30.20 - Subject to wool restraints (440)

This HTS category, 6205.90.30.20, specifically classifies men's or boys' shirts made from "other textile materials," further refined to those of silk or silk waste, and falling under the "Other" designation within that subcategory. These garments are distinct from other men's or boys' shirts classified under 6205.90.30 due to their specific material composition and are subject to wool restraints, indicated by the "(440)" notation.

Unlike its siblings, this classification excludes shirts subject to cotton restraints (6205.90.30.10), those subject to man-made fiber restraints (6205.90.30.30), and other shirts not fitting the specific material criteria or restraint categories (6205.90.30.50). The defining characteristic here is the presence of silk or silk waste as the primary textile material, coupled with the specific trade restraint applicable.

As this is a leaf node within the HTS structure, there are no further subcategories under 6205.90.30.20. Therefore, classification at this level is final for eligible merchandise. Importers and exporters should ensure that the material composition is definitively silk or silk waste and that all relevant trade regulations, including the specified wool restraints, are understood and complied with for accurate customs declaration.