For years, the answer to most problems in a fabric factory in southern Viet Nam was the same: management decided, workers complied. If the walls needed repainting, they were repainted. Suggestions were not part of the process. Neither were questions. Concerns, if they existed, had nowhere to go—and so, mostly, they did not go anywhere at all.
That silence is not unique to this factory, or to Viet Nam. It is structural. Tier 2 suppliers—the producers of yarn, fabric, and raw materials that sit one step behind the brands' direct contractors—exist largely outside formal due diligence structures. Audits rarely reach them. Training programmes seldom do. And grievance mechanisms, the formal channels through which workers can raise concerns without fear of reprisal, are often either absent or so poorly understood as to be functionally useless.
Global brands have spent years building sustainability frameworks, signing multi-stakeholder commitments, and publishing human rights policies. Most of those efforts are anchored at Tier 1—the factories they contract with directly. Below that, accountability thins quickly. The further down the supply chain, the less structured the engagement; the less structured the engagement, the more invisible the worker.
The answer is neither simple nor technological. It involves rebuilding trust, shifting management culture, and persuading workers—many of whom have never been asked their opinion—that speaking up will not cost them their job. It also, as a side session at February's OECD Forum on Due Diligence in the Garment and Footwear Sector made clear, requires brands to be honest about how little structured engagement currently reaches beyond the first tier.
Between April 2024 and June 2025, a coalition of brands, a technology provider, and two NGOs attempted exactly that across nine factories in the country's south. The project combined digital grievance technology with on-the-ground training, targeting Tier 2 suppliers in Deuter Sport GmbH and Ortovox Sportartikel GmbH's supply chains, and was funded through the Partnership for Sustainable Textiles. In February, its findings were presented at a side session of the OECD Forum on Due Diligence in the Garment and Footwear Sector—one dedicated specifically to stakeholder engagement, capacity building, and grievance mechanisms in Viet Nam's lower-tier supply chains.
Over the course of the project, four grievances were submitted through the external digital system. The results raise deeper questions about what worker voice really looks like beyond audits.