5208.21.20 - Of number 42 or lower number

This HTS category, 5208.21.20, encompasses bleached woven fabrics of cotton that are characterized by a plain weave, weigh not more than 100 g/m², and are of a yarn numbering 42 or lower. This specific yarn count designation is a critical differentiator, indicating a relatively coarser yarn compared to other options within the bleached, plain weave, lightweight cotton fabric group.

Distinguishing this category from its siblings, 5208.21.40 (yarn numbers 43 to 68) and 5208.21.60 (yarn number 69 or higher), hinges entirely on the precise measurement of the yarn's fineness or thickness. Fabrics classified under 5208.21.20 will have a yarn number of 42 or less, signifying a yarn that is thicker than those found in the 5208.21.40 and 5208.21.60 categories.

Within this classification, further subdivisions exist to refine the identification of specific fabric types. The subcategories of 5208.21.20.20 (Poplin or broadcloth), 5208.21.20.40 (Sheeting), and 5208.21.20.90 (Cheesecloth) allow for more granular classification based on the weave structure and intended end-use of these particular cotton fabrics. These distinctions are important for ensuring accurate customs declarations and the application of appropriate duties.