6406.10.90.90 - Other

This HTS code, 6406.10.90.90, encompasses "Other" parts of footwear that are not specifically classified under previous subheadings within heading 6406. This includes a broad range of components that are neither textile uppers (other than cotton) nor stiffeners. For instance, this category would cover parts of footwear made from synthetic materials, rubber, or leather, such as decorative elements, linings not considered part of the upper assembly, or specific structural components not falling into more granular categories.

The critical distinction for this "Other" category lies in its residual nature. It serves as a catch-all for parts of footwear not otherwise specified. For example, if a footwear part is made of a non-cotton textile material, it would fall under a sibling category. Similarly, if it is a stiffener, it would be classified elsewhere. This code applies when a part does not fit into the more defined categories of specific materials or functions within the broader heading for footwear parts.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Classification at this level requires careful examination of the specific part to ensure it does not qualify for a more precisely defined category higher up in the hierarchy, particularly within heading 6406, and that it is indeed a component intended for footwear.