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Thinx settled a lawsuit over chemicals in its period underwear. Here's what to know

The lawsuit says Thinx underwear, long marketed as safe and sustainable, contains harmful chemical substances known as PFAS. The company denies those allegations but will pay up to $5 million.
A Thinx billboard is pictured in New York City in September 2021. The company is accused of misleading consumers about the safety of its period underwear, but denies all allegations and admits no wrongdoing.

If you live in the U.S. and bought Thinx underwear recently, you could soon be getting some money back.

That's because the period panty brand has just settled a class-action lawsuit alleging that its products — long marketed as a safer, more sustainable approach to menstrual hygiene — contain potentially harmful chemicals.

Plaintiffs say third-party testing on the underwear revealed the presence of short chain per-and polyfluoroalkyl substances (PFAS), human-made chemicals that are found in many consumer and industrial products, do not easily break down and have been linked to adverse health effects. And they're accusing the company of fraud and other deceptive practices as a result.

"Through its uniform, widespread, nationwide advertising campaign, [Thinx] has led consumers to believe that Thinx Underwear is a safe, healthy and sustainable choice for women, and that it is free of harmful chemicals," the said. "In reality, Thinx Underwear contains harmful chemicals ...

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