5407.61.99.55 - Weighing more than 170 g/m² (620)

This HTS classification, 5407.61.99.55, specifically identifies woven fabrics of synthetic filament yarn that weigh more than 170 grams per square meter. These fabrics are characterized by containing 85 percent or more by weight of polyester filaments, and crucially, these polyester filaments are not textured. The "Other" designations at this level indicate fabrics that do not fall into more specific sub-classifications within this broader group.

The primary distinction for this category lies in its weight. It is differentiated from its sibling category, "Weighing not more than 170 g/m²," by the objective physical characteristic of being heavier. This weight threshold is a critical factor in determining the appropriate classification, often reflecting differences in weave density, yarn thickness, or finishing processes. Furthermore, within the context of polyester filament fabrics, this category specifically excludes those made with textured filaments, focusing on the characteristics of non-textured yarns.

As this is a leaf node within the HTS, there are no further subcategories. Therefore, classification at this level requires a careful confirmation that the fabric meets all preceding criteria: it is a woven fabric of synthetic filament yarn, contains at least 85% polyester filaments, those filaments are non-textured, and the fabric's weight exceeds 170 g/m². Examples might include heavier upholstery fabrics, durable outdoor textiles, or certain types of industrial fabrics that fit these precise specifications.