5205.15 - Exceeding 80 nm:

This HTS category, 5205.15, classifies single yarns of uncombed cotton fibers, containing 85 percent or more by weight of cotton, and not put up for retail sale. The defining characteristic of this specific classification is the yarn's fineness, measured in metric count (nm), which exceeds 80 nm. This indicates a relatively fine thread.

Distinguishing 5205.15 from its siblings is crucial for accurate classification. While all share the common traits of being single, uncombed cotton yarns not for retail sale, the difference lies in the nm range. Categories 5205.11 through 5205.14 cover yarns with finenesses up to and including 80 nm, making 5205.15 the classification for yarns that are finer than any of those preceding it.

Within this category, further subdivisions exist to refine the classification. The subcategories 5205.15.10.00 and 5205.15.20.00 differentiate based on whether the yarn is unbleached and not mercerized, or falls into an "other" category. This allows for more precise accounting and tariff application based on the yarn's treatment and subsequent properties.