6406.90.90.00 - Other

This HTS subheading, 6406.90.90.00, captures "Other" parts of footwear and related articles, specifically those not made of textile materials, rubber, plastics, or leather. This residual category is crucial for ensuring comprehensive classification within Chapter 64, encompassing any remaining components or accessories for footwear that do not fit into the more specifically defined sibling categories. Examples within this subheading could include articles crafted from materials such as wood, metal, or composites, provided they are recognized as parts of footwear, gaiters, or similar items, or removable insoles, heel cushions, and similar articles.

The key differentiator for this subheading lies in its material composition, excluding the prevalent textile, rubber, plastic, and leather categories listed as siblings. For instance, while textile uppers for shoes would fall under 6406.90.15, and plastic components under 6406.90.30, this category is reserved for parts and accessories made from materials not already specifically enumerated. It is important to meticulously examine the primary constituent material of the article to ensure accurate classification.

As a leaf node, this subheading has no further subdivisions. Therefore, the classification within 6406.90.90.00 hinges entirely on the exclusion from the specifically listed material categories and the confirmation that the item is indeed a part of footwear, gaiters, or similar articles, or one of the specified accessories like removable insoles or heel cushions. When in doubt, consulting specific rulings or seeking expert advice is recommended to ensure correct compliance.