Polyester microplastic exposure hits supply chain radar

A University of Memphis pilot study measured microplastic exposure up to 42 percent higher in participants' breathing zones when they wore polyester T-shirts instead of cotton. The finding lands directly on fiber selection decisions, and it arrives with funding from the National Cotton Council's Cotton Foundation — a fact buyers should weigh when reading the results.

The study involved 10 participants who wore cotton and polyester-containing shirts during daytime activities. Researchers collected 12-hour baseline air measurements in participants' bedrooms and used micro-Fourier transform infrared spectroscopy to identify particle size and chemical composition. Concentrations approached 2,000 particles per cubic meter near polyester wearers, with PET identified in 99 percent of detected airborne microplastics.

"Our findings suggest that synthetic garments are a contributing source of microplastic particles within an individual's immediate breathing zone," said Chunrong Jia, professor of environmental health at the University of Memphis. "Fabric choice can affect how many microplastic particles a person is exposed to."

The study is small, preliminary and cotton-industry funded. Still, microplastic regulation is tightening in the EU and several US states, and synthetic fiber suppliers should expect this data to circulate in legislative and standards discussions.

What does the NSF grant mean for enzyme supply?

Portland, Ore.-based Caravel Bio has received $1,246,984 from the National Science Foundation's Small Business Innovation Research Phase II program to expand its protein engineering platform. The platform combines cell-free protein synthesis, microfluidic droplets and bacterial spore display to test millions of protein designs in parallel, feeding machine learning models that identify manufacturable candidates.

"When an experiment costs a fraction of a cent instead of tens of dollars, you stop asking which handful of ideas might work and instead start testing all of them," said chief scientific officer Emily Bowman. The grant funds work on proteins incorporating amino acids beyond the 20 found in nature.

Caravel has also developed carbon-capture enzymes through Shell's GameChanger program, reporting 12-fold stability gains under industrial conditions. Under the new grant it will expand to additional enzyme classes and pursue pilot deployments in DNA synthesis, carbon capture and rare earth separations. The company appointed Michał Jastrzębski, previously of Ginkgo Bioworks, as chief technology officer to lead its AI and protein-design work.

Where is merino capacity moving?

Minus33 Merino Wool is doubling its manufacturing footprint in Ashland, New Hampshire, cutting the ribbon Oct. 27 on a project that includes a renovated 15,000-square-foot building opening in early 2027. The company expects to grow its Ashland workforce from roughly 24 employees to 40, and it plans to add American-made merino hats and scarves to its US-made sock production.

Parent company L.W. Packard has operated in Ashland since 1916, once supplying broadcloth to Saks Fifth Avenue, L.L.Bean and the US military with a peak workforce near 300 before overseas competition drove a steep decline in the 1990s. Fourth-generation owner John Glidden rebuilt the business as Minus33, which now offers roughly 180 merino products.

"The secret to 110 years in business is making products you're proud of and hiring great people," said fifth-generation owner and president Lawson Glidden, citing three consecutive years of double-digit sales growth through direct-to-consumer, Amazon and wholesale channels. New Hampshire Gov. Kelly Ayotte attended the ribbon-cutting.

Which brands are shifting to wool and finished fabrics?

Yeti has entered performance apparel with two merino styles using Nuyarn Technologies' spinning process, which avoids tight fiber twisting. Nuyarn claims nine times greater durability, 35 percent more thermal retention, three times faster drying and 30 percent less material than conventional spun wool. Both styles sell through Yeti's US website, with more in development. "We fundamentally believe our merino technology sets a new standard," said Nuyarn CEO Andy Wynne.

Montreal's Ciele Athletics launched its second Woolmark-certified collection, built on its Sorino | WS merino-silk blend across base layers, face masks, neck tubes and bclavas. Woolmark certification verifies wool content, colorfastness, durability and laundering performance. "We make things to be worn hard and kept for a long time," said co-founder Jeremy Bresnen.

German menswear maker Olymp is applying Livinguard Fresh, a Swiss odor-control finish that uses a positively charged fabric surface to neutralize odor molecules, across selected shirts, polos and T-shirts. Olymp says washing reactivates the bonded treatment. "Modern officewear has to do far more than just look good," said managing director Heiko Ihben.

What compliance and event dates matter?

Heimtextil will open a Functional Futures Lab in Hall 4.1 at its Frankfurt show, Jan. 12-15, 2027, developed with Future Fabrics Expo and organized into Circular Systems, Living Nature and Natural Performance categories. Exhibits — including living-root upholstery and food-waste dyes — will carry Technology Readiness Level labels so buyers can separate prototypes from commercial products.

Textiles Recycling Expo USA returns to the Charlotte Convention Center April 7-8, 2027, organizer AMI announced. The inaugural show drew more than 1,800 attendees and 95 exhibitors; the 2027 program covers fiber-to-fiber recycling, sorting infrastructure and recycling legislation, and runs alongside the new Textiles Manufacturing Expo.

Separately, the Coalition to Abolish the Fur Trade said Bain partner Claudia D'Arpizio resigned Oct. 26 from the board of Fondazione Altagamma after CAFT staged 57 protests across 14 cities in five countries between Sept. 11 and Oct. 23. CAFT claims five sponsors — including Wella, DHL and Visa — ended Milan Fashion Week sponsorships, and it will continue targeting Altagamma until the event bans fur.

For sourcing teams, the week's decisions are concrete: weigh polyester's exposure data against pending microplastic rules, track enzyme finishing as a cost curve, and note that US merino capacity — not just offshore — is expanding.