5109.10.80.00 - Of wool fiber with an average fiber diameter of 18.5 microns or less (400) 🖩

This HTS classification covers yarn composed of 85 percent or more by weight of wool or fine animal hair, specifically when it is presented for retail sale and consists of wool fibers with an average diameter of 18.5 microns or less. The "other" designation at this level indicates that it does not fall into any more specific subcategories beyond its fiber content, retail presentation, and average fiber diameter. These yarns are typically used in crafting, knitting, or crocheting by consumers.

Distinguishing this category from its sibling, 5109.10.90.00, is crucial. While both are yarns of wool or fine animal hair for retail sale and contain 85 percent or more wool or fine animal hair, this specific classification hinges on the average fiber diameter of the wool component being 18.5 microns or less. The sibling category encompasses all other yarns meeting the broader criteria but not specifically defined by this precise average fiber diameter.

As this is a leaf node in the HTS structure, there are no further subcategories branching from this point. Therefore, classification decisions at this level will primarily rely on confirming that the yarn meets the stipulated percentage of wool or fine animal hair, is presented for retail sale, and most importantly, that the average diameter of its wool fibers does not exceed 18.5 microns. Any deviation in these specific criteria would necessitate re-evaluation against other relevant HTS provisions.