5210.19.10.00 - 3-thread or 4-thread twill, including cross twill (317)

This HTS category, 5210.19.10.00, specifically classifies unbleached woven fabrics of cotton, containing less than 85 percent by weight of cotton mixed mainly or solely with man-made fibers, and weighing not more than 200 g/m², that are characterized by a 3-thread or 4-thread twill, including cross twill weave. This definition focuses on the structural pattern of the weave, distinguishing it from other twill variants or satin weaves.

The distinction from sibling category 5210.19.20, which covers satin weave or twill weave other than the specified 3-thread or 4-thread twill or cross twill, is crucial. If a fabric exhibits a satin weave, or a twill weave that doesn't fit the 3-thread or 4-thread pattern (e.g., a different number of threads or a distinct twill construction), it would fall under the sibling. The "Other" sibling category would encompass remaining fabric types not specifically defined.

As this HTS code is a leaf node, there are no further subcategories. Therefore, the classification hinges entirely on the precise identification of the weave structure as a 3-thread or 4-thread twill, including cross twill, in conjunction with the material composition, weight, and unbleached state as defined by the higher-level headings. Examples of fabrics fitting this description could include certain types of denim, gabardine, or serge specifically meeting the thread count and twill type criteria.