6401.99.10.00 - Covering the knee

This classification, HTS 6401.99.10.00, specifically covers waterproof footwear that extends to cover the knee. These items are constructed with outer soles and uppers made from rubber or plastics. A key defining characteristic is the method of assembly: the uppers are not permanently affixed to the sole through processes like stitching, riveting, nailing, screwing, plugging, or similar means, indicating a construction that often involves molding or vulcanization.

Within the broader category of "Other footwear" under waterproof footwear assembled without traditional fastening methods, this subcategory focuses exclusively on items designed to provide protection up to and over the knee. This distinguishes it from other "Other" categories which might cover footwear of different heights or those with alternative construction methods not meeting the specific criteria of this leaf node.

As this is a leaf node within the HTS structure, there are no further subcategories. Therefore, the classification is definitive for waterproof, knee-high footwear made of rubber or plastic where the upper is not attached to the sole by conventional fastening techniques. Examples include certain types of waders, specialized protective boots for agricultural or industrial use, and some types of extreme weather footwear designed for deep snow or water immersion. The defining criteria remain the material, the method of assembly, and the full-leg coverage.