5503.20.00.25 - Measuring less than 3.3 decitex

This HTS classification, 5503.20.00.25, specifically covers synthetic staple fibers of polyester that are not carded, combed, or otherwise processed for spinning, and crucially, measure less than 3.3 decitex. Decitex is a unit of linear mass density, representing the mass in grams of 10,000 meters of fiber. Therefore, this category is for extremely fine polyester staple fibers. Examples of such fibers might be used in specialized applications requiring softness, drape, or high thread counts, such as in certain types of high-quality apparel or technical textiles where fineness is a critical characteristic.

The key differentiator for this subcategory lies in its fineness. It is distinguished from its sibling categories by the decitex measurement. Sibling category 5503.20.00.45 covers polyester staple fibers measuring 3.3 decitex or more but less than 13.2 decitex, indicating a coarser fiber. Category 5503.20.00.65, in contrast, applies to fibers measuring 13.2 decitex or more, representing even thicker fibers. This strict adherence to decitex measurement ensures precise classification based on the physical fineness of the polyester staple fiber.

As this is a leaf node within the HTS classification system, there are no further subcategories that subdivide this specific product. The classification is complete at this level, with the distinction solely based on the decitex measurement of the polyester staple fiber. Therefore, any polyester staple fiber meeting the criteria of being of polyester, not carded, combed, or otherwise processed for spinning, and measuring less than 3.3 decitex, will fall under this specific HTS code.