6402.91.40.67 - Other

This HTS classification covers footwear that is not specifically addressed in prior headings, where the outer sole and upper are predominantly made of rubber or plastics. Crucially, this category applies to footwear designed to cover the ankle, and further refines to "other" types beyond those with specific structural elements like foxing or functional stitching that might exempt them under note 4(a). The extensive material composition requirement for the upper being over 90% rubber or plastics is a key determinant for inclusion here, excluding certain protective footwear designed to be worn over other shoes.

This specific subcategory, identified by the "Other" designation within the "Covering the ankle" and "Other" breakdowns, differentiates itself from sibling categories based on the intended wearer. Unlike footwear specifically designated for men or women, or the distinct classification for infants, this "Other" category serves as a residual grouping for ankle-covering footwear made of rubber or plastics that does not fall into those more precise demographic classifications.

As this is a leaf node in the HTS structure, there are no further subcategories branching from this point. Classification at this level is final and relies on a thorough assessment of the footwear's physical characteristics against the detailed material and design specifications outlined in the parent descriptions and chapter notes. Examples would include general-purpose ankle boots or high-top shoes made predominantly of rubber or plastic, not specifically for infants, men, or women where such distinctions are further detailed.