The Nature Conservancy (TNC) launched the Microfiber Action Alliance (MAA) on October 6, 2026, convening six apparel brands — Nike, Patagonia, Under Armour, lululemon, Cotopaxi and REI Co-op — under a multi-stakeholder initiative targeting microfiber pollution across textile supply chains.

What supply-chain work will the alliance pursue?

TNC will work with members to trace where microfiber shedding occurs during fibre production, fabric finishing and consumer use. Each company will run interventions inside its own supply chain, then share data, methodology and design parameters generated from those pilots.

"We're focusing on advancing solutions that can scale beyond Nike," said Scott Vitters, Senior Director of Global Sustainability at Nike. "Through the Microfiber Action Alliance, we're combining scientific insight with industry collaboration to better understand where pollution occurs, deploy effective interventions and accelerate progress across the apparel value chain."

How large is the microfiber problem?

Estimates cited by TNC put microfibers at more than 30% of ocean microplastics. Synthetic fibres dominate the discussion, yet treated natural fibres — cotton and wool finished with dyes, softeners or coatings — shed too. Once dispersed, microfibers resist standard removal.

"We all must work to treat low-shedding construction as an engineering parameter embedded in design decisions from day one, not a metric measured at the end," said Kyle Blakely, Senior Vice President of Design, Innovation and Development at Under Armour. "No single brand can solve this alone. Complete coordinated action across the value chain is essential."

What existing infrastructure does MAA build on?

The alliance complements The Microfibre Consortium (TMC), the industry body producing the science, data and tools on fibre fragmentation. TNC framed MAA as the deployment layer above TMC's research base.

"The Microfibre Consortium welcomes the Alliance's focus on accelerating the adoption of new technologies and innovation across supply chains," said Kelly Sheridan, CEO of The Microfibre Consortium. "We look forward to working with its members, and the wider industry, to reduce fiber fragmentation."

What has each brand committed?

Patagonia's Matt Dwyer, vice president of global product footprint, tied the work to the full supply chain and product life. "Microfiber pollution is a pervasive problem that affects everyone on the planet, and this alliance creates strategic tools for apparel companies to find solutions to that problem," Dwyer said. "We're addressing microfibers throughout our supply chain while also investing in ways to reduce shedding during our products' lifecycles."

REI's Andrew Dempsey, director of sustainability, pointed to joint research. "Through the Microfiber Action Alliance, we have an opportunity to build on that work and turn shared learning into collective action that helps protect the health of the outdoors for future generations," he said.

Cotopaxi's Annie Agle, vice president of impact and sustainability, connected the work to broader climate targets. "The brands involved are coming together now to help move the industry in the right direction and keep plastic out of our bodies and watersheds," Agle said.

What does the news force on sourcing and compliance?

For sourcing and compliance teams, the alliance signals a shift from voluntary microfiber disclosure toward shared engineering specifications embedded at the design brief. Founding members have committed to share data, methodology and pilot results generated inside their own supply chains, with lessons distributed to the wider industry.

Patrick Jurney, Plastics Project Director at The Nature Conservancy in California, framed the urgency. "We have seen incredible scientific advancements around this issue, informed by years of industry research, and The Nature Conservancy is excited to help companies apply and build upon those efforts," Jurney said. "Addressing microfiber pollution is a complicated problem that requires collaboration across the textile sector."

Apparel companies can apply to join via nature.org/microfibers.