5407.61.91.00 - Wholly of polyester, of single yarns meas- uring not less than 75 decitex but not more than 80 decitex, having 24 filaments per yarn and with a twist of 900 or more turns per meter (619)

This HTS classification covers woven fabrics composed entirely of polyester filament yarns. Specifically, these fabrics are characterized by their yarn construction: the single yarns must measure between 75 and 80 decitex, contain precisely 24 filaments each, and possess a twist of 900 or more turns per meter. These detailed specifications regarding yarn denier, filament count, and twist level are crucial for distinguishing these fabrics from other woven polyester materials.

The primary distinction for this category, 5407.61.91.00, lies in its precise yarn characteristics. While it falls under the broader umbrella of woven fabrics containing 85 percent or more by weight of polyester filaments, it is further refined by the specific decitex range, filament count, and twist applied to the constituent yarns. This level of detail ensures that fabrics with these particular yarn properties are correctly identified and separated from other woven polyester fabrics that might differ in yarn construction, even if they are also wholly of polyester and non-textured.

As this node represents a leaf category within the HTS structure, there are no further subcategories to introduce. Classification at this level is definitive based on the detailed physical properties of the yarn used in the fabric. Therefore, any woven fabric that meets all the criteria of being wholly of polyester, composed of single yarns within the 75-80 decitex range, having 24 filaments per yarn, and a twist of 900 or more turns per meter will be classified here.