6403.99.60.15 - House slippers

This classification specifically pertains to house slippers, which are designed for indoor wear and typically feature soft, flexible construction and often comfort-oriented materials. While the broader category of footwear with outer soles of rubber, plastics, leather, or composition leather and uppers of leather is vast, this subcategory narrows the focus to items intended for domestic use rather than outdoor activities.

The distinction between this category and its sibling, "Work footwear" (6403.99.60.25), lies primarily in purpose and construction. House slippers, by their nature, are not built for the durability, protection, or specific functional requirements associated with work footwear. They generally lack the robust features such as reinforced toes, specialized tread patterns, or water-resistant materials often found in items classified as work footwear.

As this is a leaf node in the HTS, there are no further subcategories. Therefore, the classification of an article as "House slippers" under 6403.99.60.15 hinges on its evident intended use as comfortable indoor footwear. Key considerations for classification would include the flexibility of the outer sole, the materials used in the upper (which must be leather as per the parent category), and the absence of features indicative of outdoor or specialized professional use.