6403.51.30.30 - Other

This HTS classification, 6403.51.30.30, specifically designates "Other" footwear that meets the preceding criteria, namely: having outer soles of leather and uppers also made of leather, covering the ankle, and constructed using the welt method. This category captures welted footwear for men that doesn't fit into more specific designations based on upper materials.

The key differentiator for this category is the absence of a specific upper material beyond general leather. It exists alongside the sibling category 6403.51.30.15, which is exclusively for welted, ankle-covering men's footwear with pigskin uppers. Therefore, if the welted men's boot or shoe has an upper made of cowhide, calfskin, goatskin, or any other type of leather not specifically enumerated at the 6403.51.30.15 level, it would be classified under this "Other" designation.

As this is a leaf node, there are no further subcategories to introduce. Classification ceases at this point, meaning that the precise combination of leather outer sole, leather upper, ankle coverage, welt construction, and male gender for the footwear concludes the detailed breakdown within this branch of the HTS. The practical application involves verifying all preceding criteria and confirming the absence of a more specific upper material designation.