6006.21.10.00 - Circular knit, wholly of cotton yarns exceeding 100 metric number per single yarn (222)

This HTS classification, 6006.21.10.00, specifically pertains to circular knitted fabrics that are made entirely from cotton yarns. A key defining characteristic for inclusion in this category is that the individual cotton yarns must exceed 100 metric number (Nm) per yarn, which translates to a finer yarn count. These fabrics are typically used in a wide array of textile products, ranging from apparel to home furnishings, where the specific properties of fine, circularly knitted cotton are desired.

This category is distinguished from its sibling, 6006.21.90 ("Other"), by the precise yarn specification. While both are circular knit fabrics of cotton that are unbleached or bleached, 6006.21.10.00 is reserved for those made with exceptionally fine cotton yarns (exceeding 100 Nm). The "Other" category would encompass similar circular knit cotton fabrics that do not meet this specific fine yarn requirement, or potentially other unbleached or bleached circular knit cotton fabrics that fall outside the more granular specifications.

As this classification represents a leaf node within the HTS, there are no further subcategories. Therefore, the classification hinges entirely on the precise material composition (wholly of cotton), the knitting construction (circular knit), the yarn fineness (exceeding 100 metric number per single yarn), and the treatment state (unbleached or bleached). Importers and exporters should ensure accurate documentation of yarn count to facilitate correct classification.