5406.00.10 - Synthetic filament yarn

This category encompasses synthetic filament yarn, excluding sewing thread, that is specifically packaged for retail sale. The term "synthetic" in this context refers to yarn produced from man-made polymers, such as acrylic, polyester, nylon, and others, which are manufactured through chemical processes. The defining characteristic for inclusion here is the yarn's presentation, being prepared in a manner suitable for direct sale to consumers, typically in skeins, balls, or hanks of manageable size.

It is important to distinguish this category from its sibling, 5406.00.20.00, which covers artificial filament yarn. While both relate to filament yarn, "synthetic" denotes yarn derived from man-made polymers, whereas "artificial" refers to yarn made from natural polymers that have been regenerated, such as rayon or modal. Therefore, the material composition is the primary differentiator between these two sibling categories.

The subcategories under 5406.00.10 further refine the classification based on the specific synthetic material from which the yarn is produced. This includes distinctions for yarns of acrylic (5406.00.10.20), polyesters (5406.00.10.40), and a residual category for all other synthetic filament yarns put up for retail sale (5406.00.10.90). This detailed breakdown allows for precise identification and statistical tracking of different types of synthetic yarns based on their chemical origin.