Thinx to pay up to $5 million to settle claims its period underwear contained potentially harmful chemicals

If you bought a period underwear product made by Thinx, you may now be entitled to a refund thanks to a class-action lawsuit settlement announced in November.

Plaintiffs in the suit accused Thinx of using — and not telling customers about — potentially harmful chemicals known as PFAS in the underwear.

Thinx, which launched in 2013 and is based in New York, has agreed to pay $4 million to pay for claims submitted by customers and for any court-approved attorneys’ fees, expenses and service awards the customers may be owed. The company has also agreed to provide up to an additional $1 million if needed to cover valid claims.

As part of the settlement, Thinx denied all the allegations leveled by the plaintiffs and asserted that the settlement is not an admission of guilt.

PFAS, or per- and polyfluoroalkyl substances, is a family of synthetic chemicals used in the manufacture of consumer products — including food wrappers, cosmetics, or textiles such as raincoats or workout clothes — because of ​​their ability to resist stains, grease and water.

The presence of PFAS appears to have been first reported in January 2020 in the Sierra Club’s magazine, “Sierra,” with the headline, “My Menstrual Underwear Has Toxic Chemicals in It.” Reporter Jessian Choy sent her Thinx to a University of Notre Dame nuclear scientist, who found high levels of PFAS, “especially on the inside layers of the crotch.”

That ran counter to Thinx's claims that its products were "certified" organic, Choy wrote.

PFAS are referred to as “forever chemicals” because they can linger permanently in the air, water and soil. Exposure to PFAS has been associated with low birth weight, high cholesterol, thyroid disease and an increased risk of certain cancers such as liver cancer.

“With the extent to which we’re seeing PFAS in the environment and in our bodies, and the really harmful effects that occur at low levels of exposure, we need to act more urgently to get PFAS out of all apparel,” said Erika Schreder, the science director at Toxic-Free Future, an environmental health research and advocacy group.

"We would be particularly concerned about exposure through the skin for a textile that's worn next to the skin for extended periods," she added, citing preliminary evidence that PFAS can cross the skin barrier and potentially enter the bloodstream.

Thinx customers may receive a $7 refund for each purchase of up to three pairs of Thinx period underwear reflected in Thinx’s records, or for which they provide a valid proof of purchase.


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