Lines 6103421035 and 6103421065 cover boys' trousers and shorts that are imported as component parts of playsuits — coordinated sets where the bottom is sold or entered together with a matching top as a single article. These are carved out because the commercial and duty treatment of a playsuit component can differ from a standalone bottom. Importers should confirm whether the garment is entered as part of a set or as a separate article, as this affects which 10-digit line applies.

Line 6103422010 covers insulated overalls for both men and boys, while 6103422015 and 6103422025 cover non-insulated boys' overalls split by size range (sizes 2–7 versus other sizes). Insulation — typically a quilted or padded inner layer — must be present in the garment construction itself, not merely a thick fabric. Importers should obtain construction specifications confirming the presence or absence of an insulating layer, as the distinction affects the applicable tariff line and associated duty rate.