6401.99 - Other:

This HTS category, 6401.99, encompasses waterproof footwear constructed with outer soles and uppers made from rubber or plastics. A key defining characteristic is that the uppers are not attached to the sole through traditional assembly methods such as stitching, riveting, nailing, screwing, or plugging. This includes footwear that does not fall under the more specific criteria of categories like 6401.92, which precisely covers waterproof footwear with uppers that extend to cover the ankle but not the knee.

Within this broader classification, the distinction lies in the height of the footwear relative to the knee. Category 6401.99.10.00 specifically addresses waterproof footwear that covers the knee. All other waterproof footwear, where the uppers do not reach the knee and are not attached by the specified methods, will fall under the "Other" subdivision within 6401.99, requiring further examination of their specific height and construction details if not already captured by a more granular sibling.