CBP generally requires that suit components be of the same fabric — same construction, color, and composition — not merely the same yarn. Different stitch patterns producing visually distinct fabrics would likely disqualify the set from 'suit' classification, placing it in the ensemble heading instead. A binding ruling from CBP is the most reliable way to confirm classification for borderline cases.

Section 301 tariffs apply at the HTS 10-digit subheading level and vary by origin. Knitted ensembles from affected origins may carry additional duties; importers should verify the current status of applicable subheadings and any product exclusions with a licensed customs broker before shipment.