5408.23.11.00 - Of cuprammonium rayon (618)

This HTS category, 5408.23.11.00, specifically classifies woven fabrics manufactured from artificial filament yarn, with a particular emphasis on those made from cuprammonium rayon. These fabrics must contain 85 percent or more by weight of artificial filament or strip, and importantly, be of yarns of different colors. The defining characteristic for this specific subcategory is a precise thread count: over 69 but not over 142 threads per centimeter in the warp, and over 31 but not over 71 threads per centimeter in the filling, treating multiple or cabled yarns as single threads for this calculation.

This classification distinguishes itself from its sibling category, 5408.23.19.00 ("Other"), by the stringent thread count requirements outlined above. While both categories fall under woven fabrics of artificial filament yarn, containing 85% or more artificial filament, and utilizing yarns of different colors, 5408.23.11.00 is reserved for fabrics meeting the specified warp and filling thread counts. Fabrics of cuprammonium rayon that do not adhere to this precise thread count range, or which are not of yarns of different colors but still meet the other criteria, would be classified under the "Other" sibling category.

As this is a leaf node in the HTS structure, there are no further subcategories under 5408.23.11.00. Therefore, the classification is definitive once all the preceding criteria, including the specific thread count and the origin from cuprammonium rayon, are met. This category is intended to capture a very specific type of woven fabric with a particular density and construction, crucial for accurate duty assessment and trade statistics.