Hair that has been drawn, thinned, bleached, dyed, or otherwise processed beyond washing and scouring is generally considered 'prepared' and classifies under a different heading covering dressed or otherwise worked human hair. The key test is whether the processing has altered the hair's character for end-use manufacturing beyond simple cleaning.

Unworked human hair does not trigger USDA FSIS or APHIS mandatory inspection, but standard CBP entry documentation applies. Some importing firms also conduct voluntary supply-chain due-diligence audits given heightened scrutiny of forced-labor risks in hair supply chains under the Uyghur Forced Labor Prevention Act. Consult a licensed customs broker to ensure compliance with current admissibility requirements.