From the Sector

A group of polyester filament manufacturers in North and Central America has launched YarnProof, a system designed to provide physical evidence of yarn origin throughout the textile supply chain. Led by Unifi and using FibreTrace technology, the initiative embeds a persistent, invisible marker in polyester filament during extrusion. A handheld scanner can subsequently detect the marker in yarn, fabric or finished goods.

The system is intended to complement rather than replace commercial documents, audits and certificates. Each verification step can link the marked material to sourcing and production records, creating an additional check on origin claims. The manufacturers are targeting the yarn-forward rules that determine eligibility for preferential treatment under the USMCA and CAFTA-DR trade agreements.

The participating manufacturers named by Unifi include Aquafil O’Mara, CS America, CS Central America, Nan Ya Plastics Corporation America, Premiere Fibers, Sans Americas, Skytex México, Tecnología Textil Avanzada, Textufil, Unifi Manufacturing and United Textiles of America. Under Armour and the National Council of Textile Organizations have publicly supported the initiative.

Physical marking could help brands distinguish verified regional production from materials whose paperwork cannot be substantiated downstream. It does not, by itself, establish that a customs authority has accepted a shipment as meeting all preferential-origin requirements. Those determinations still depend on the applicable legal rules and supporting evidence.

The project illustrates a shift from traceability systems based solely on documentation toward approaches in which material identity can be checked at multiple production stages. Its commercial impact will depend on implementation across mills, brands and independent verification processes.