5509.42.00.90 - Other (604)

This HTS classification, 5509.42.00.90, covers "Other" multiple (folded) or cabled yarns composed of synthetic staple fibers. Specifically, it applies to yarns that contain 85 percent or more by weight of synthetic staple fibers and are not sewing thread, nor are they put up for retail sale. The defining characteristic of this category is its residual nature, encompassing all such folded or cabled synthetic staple fiber yarns that do not fall under more specific sub-classifications.

Distinguishing this category from its sibling, 5509.42.00.10, is crucial. The sibling category specifically covers multiple or cabled yarn of polyvinyl alcohol (PVA) fibers. Therefore, 5509.42.00.90 serves as a catch-all for folded or cabled yarns containing 85% or more synthetic staple fibers when those fibers are *not* PVA. This distinction hinges entirely on the specific type of synthetic staple fiber used in the yarn's composition.

As a leaf node, this classification does not have further subdivisions. Therefore, its practical application relies on carefully verifying the fiber content and construction of the yarn. Examples of yarns that would fall here include folded or cabled yarns made from polyester staple fibers, nylon staple fibers, or acrylic staple fibers, provided they meet the 85% by weight threshold of synthetic staple fibers and are not specifically PVA. The key for classification is to first determine if the yarn is a folded or cabled yarn of synthetic staple fibers, then confirm it contains 85% or more synthetic staple fibers by weight, and finally, ascertain that it is not of polyvinyl alcohol (PVA) fibers.