5101.21.15.00 - Unimproved wool; other wool, not finer than 40s

This HTS classification, 5101.21.15.00, specifically covers unimproved wool, along with other wool of similar character, that is not finer than 40s in terms of count. This refers to wool that has undergone degreasing but has not been subjected to any further processing beyond removing grease and impurities. It represents a broad category of raw wool that has not been carded or combed and remains in a relatively natural state, suitable for various downstream manufacturing processes.

To differentiate this category from its siblings, consider the fineness of the wool. HTS 5101.21.30.00 and 5101.21.35.00 address "Other wool" that is finer than 40s, specifically distinguishing between wool finer than 40s but not finer than 44s, and wool finer than 44s, respectively. Therefore, 5101.21.15.00 is the designated classification for wool that falls at or below the 40s fineness standard.

As this is a leaf node within the HTS, there are no further subcategories. Classification within 5101.21.15.00 is determined by the material being wool, in a degreased but not carbonized state, shorn, and not further processed beyond degreasing, with a fineness not exceeding 40s. The term "unimproved wool" also signifies that it hasn't undergone any treatment that would alter its inherent characteristics beyond basic cleaning.