9401.80.60.21 - With detachable hard-shell seat

This HTS category, 9401.80.60.21, specifically classifies child safety seats that are designed with a detachable hard-shell seat. These are distinct from other types of seats for children that might have different constructions or features. The key defining characteristic is the presence of a hard-shell component that can be detached from the base or stroller system.

This classification is a subcategory of "Other seats" within heading 9401, which broadly covers furniture and seating. It distinguishes itself from its sibling category, 9401.80.60.23 ("Other"), by the specific inclusion of the detachable hard-shell feature. While 9401.80.60.23 would encompass other child safety seats that do not possess this particular construction, 9401.80.60.21 is reserved for those that explicitly feature a removable hard-shell seat.

As this is a leaf node in the HTS classification, there are no further subcategories. Therefore, the classification is determined solely by the presence and nature of the detachable hard-shell seat. Examples within this category would include infant car seats with a base that remains in the vehicle and a separate hard-shell carrier that clicks into the base and is easily detached for carrying the infant.