5402.33 - Of polyesters:

This HTS subheading, 5402.33, specifically classifies textured synthetic filament yarn, excluding sewing thread and monofilaments less than 67 decitex, that is not packaged for retail sale. The defining characteristic here is that the yarn is composed of polyesters, meaning it is derived from polyester polymers. This category serves to group a significant portion of textured polyester filament yarns based on their material composition.

It is crucial to distinguish 5402.33 from its sibling categories. For instance, 5402.31 and 5402.32 pertain to textured yarns of nylon or other polyamides, differing by the decitex of the single yarn. Similarly, 5402.34 covers textured polypropylene yarns. Subheading 5402.39 is a catch-all for other textured synthetic filament yarns not specified elsewhere. Therefore, classification under 5402.33 hinges on the presence of polyester as the primary constituent material.

Within this polyester category, further distinctions are made based on the construction of the yarn. Subcategory 5402.33.30.00 covers single yarns, which are individual strands before being combined or twisted. Conversely, subheading 5402.33.60.00 encompasses multiple (folded) or cabled yarn, indicating that two or more single yarns have been twisted together. This differentiation is essential for accurate statistical reporting and potential duty rate application.