6402.91.50 - Footwear designed to be worn over, or in lieu of, other footwear as a protection against water, oil, grease or chemicals or cold or inclement weather

This HTS classification, 6402.91.50, pertains to "Other footwear with outer soles and uppers of rubber or plastics: Other footwear: Covering the ankle: Other: Other" that are specifically designed as protective coverings to be worn over existing footwear or as standalone protective gear. The primary function of these articles is to shield the wearer's feet from elements such as water, oil, grease, chemicals, or adverse weather conditions. Examples include waterproof overshoes, chemical-resistant boots, and insulated cold-weather booties.

While at the same level as other "Other" categories, this subheading is distinguished by its explicit purpose of offering enhanced protection beyond general wear. It differentiates itself from general-purpose footwear by its specialized protective function and the materials typically employed, which prioritize impermeability and resistance to specific hazards. The key differentiator lies in the intended use as a supplementary or specialized protective layer rather than standard daily footwear.

This category further subdivides into specific gender-based categories, "For men" and "For women," to accommodate variations in sizing and design tailored to each gender. The existence of these subcategories allows for more precise classification based on the intended wearer. The final subcategory, "Other," at 6402.91.50.90, acts as a residual category for any protective footwear that falls under this broad description but does not fit into the gender-specific subdivisions, ensuring comprehensive coverage within this protective footwear classification.