5408.23.21.00 - Of cuprammonium rayon (618)

This HTS classification, 5408.23.21.00, specifically designates woven fabrics that are composed of artificial filament yarn and contain 85 percent or more by weight of artificial filament or strip. The defining characteristic of this subcategory is that the artificial filament yarn used is derived from cuprammonium rayon. This material is a type of manufactured regenerated cellulose fiber, distinguished by its production process and resulting properties.

This category is differentiated from its sibling, 5408.23.29, by the precise nature of the artificial filament yarn. While both fall under "Other woven fabrics, containing 85 percent or more by weight of artificial filament or strip or the like: Of yarns of different colors: Other," 5408.23.21.00 is exclusively for fabrics made with cuprammonium rayon yarns. The sibling category would encompass other types of artificial filament yarns not specifically identified as cuprammonium rayon within this structural framework.

As this is a leaf node, there are no further subcategories to introduce. The classification is fully defined at this level, focusing on the material composition of the woven fabric. The practical classification criteria here are the material type of the artificial filament yarn (cuprammonium rayon) and its preponderance (85% or more by weight) in the woven fabric, alongside the fact that the yarns are of different colors.