5210.51 - Plain weave:

This HTS category, 5210.51, specifically classifies woven fabrics of cotton that contain less than 85 percent by weight of cotton, are mixed mainly or solely with man-made fibers, and do not exceed 200 grams per square meter in weight. Crucially, these fabrics must be **printed**. This printing differentiates them from other fabrics within the 5210 grouping.

Within the broader classification of "Woven fabrics of cotton, containing less than 85 percent by weight of cotton, mixed mainly or solely with man-made fibers, weighing not more than 200 g/m²," this sub-heading is distinct from its sibling category, 5210.59, which covers "Other fabrics" of the same composition but that are not printed. Therefore, the presence of a printed design is the key criterion for inclusion under 5210.51.

To further refine classification, HTS 5210.51 is divided into subcategories based on the yarn count or fineness of the fabric, denoted by "number." These subcategories, 5210.51.40, 5210.51.60, and 5210.51.80, distinguish between fabrics made with finer yarns (higher numbers) and those made with coarser yarns (lower numbers). This distinction is important for specific trade regulations and duties applied to textiles of varying yarn fineness.