Thinx Lawsuit 2026: The $5 Million PFAS Settlement and What It Means Now
Quick Answer
- Thinx settled a class action for $5 million over claims that its period underwear contained PFAS “forever chemicals.”
- Class members could claim up to $21 cash (for three pairs at $7 each) or a 35% off voucher, but the claim deadline was April 12, 2023.
- Thinx denied all wrongdoing and confirmed PFAS were never part of its product design .
The Thinx lawsuit was a class action filed in the U.S. District Court for the Southern District of New York. It alleged that Thinx marketed its period underwear as safe and sustainable, but testing found PFAS, a class of chemicals linked to serious health problems . Thinx agreed to settle for $5 million in November 2022, and the court granted final approval in May 2023 .
This article breaks down what the settlement covered, who qualified, and what the science says about PFAS in period products. One important detail: the settlement was about marketing claims, not injuries, and Thinx never admitted that its products caused harm .
The Facts
| Case | Dickens, et al. v. Thinx Inc. |
|---|---|
| Court | U.S. District Court, Southern District of New York |
| Case Number | 1:22-cv-04286-JMF |
| Status | Settled, final approval granted May 24, 2023 |
| Fund Size | $5,000,000 |
| Est. Per Person | Up to $21 cash or a 35% off voucher |
| Claim Deadline | April 12, 2023 (passed) |
| Administrator | Epiq |
| Proof Needed | Claim form; attestation accepted without proof |
Is the Thinx Lawsuit Legit or a Scam?
The Thinx lawsuit is a legitimate, court-approved class action settlement. It was overseen by U.S. District Judge Jesse M. Furman, and the settlement received final approval on May 24, 2023 . The official settlement website confirms the case details, deadlines, and payment terms.
The scam risk now comes from websites claiming you can still file a claim or get a new payment. The claim deadline was April 12, 2023 . That date has passed. Any site promising a new Thinx payout is misleading you.
Thinx did not admit liability or wrongdoing as part of the settlement. The company stated that PFAS “have never been a part of its product design” and that it settled “to focus our attention on doing what we do best” .
Key Takeaway: The Thinx settlement is real and closed. The claim deadline passed in April 2023. No new claims can be filed.
How Much Could You Get From the Thinx Settlement?
The Thinx settlement created a $4 million cash fund, with Thinx agreeing to pay up to an additional $1 million if needed to cover valid claims . Class members could choose between cash reimbursement and a discount voucher.
Here is the verified breakdown:
| Benefit Type | Amount |
|---|---|
| Cash with proof of purchase (per pair) | $7.00 |
| Cash without proof of purchase (per pair) | $3.50 |
| Maximum cash (3 pairs) | $21.00 (with proof) or $10.50 (without proof) |
| Voucher | 35% off up to $150 purchase (max discount $52.50) |
The voucher was valid for six months from issuance and could be used on full-price eligible Thinx products . Class members had to elect either cash or the voucher on their claim form. If they failed to choose or chose both, they received cash by default .
Attorneys’ fees were capped at $1.5 million, and each of the five named plaintiffs received service awards of up to $2,500 (totaling up to $12,500) .
Key Takeaway: Class members could receive up to $21 cash or a 35% off voucher. The cash amount depended on whether they had proof of purchase.
Who Qualified for the Thinx Settlement?
Class members were all U.S. residents who purchased Thinx Period Underwear between November 12, 2016 and November 28, 2022 . The class included purchases of specific styles: Cotton Brief, Cotton Bikini, Cotton Thong, Sport, Hipbugger, Hi-Waist, Boyshort, French Cut, Cheeky, and Thong .
Notice was sent to approximately 1,288,730 identified class members, and it reached about 99% of them . The settlement administrator was Epiq, which handled the claims process and distribution .
If you purchased Thinx during that period, you were likely a class member. You did not need to file a claim if you wanted to remain in the class, but you had to file a claim by April 12, 2023 to receive a payment .
Key Takeaway: If you bought Thinx between November 2016 and November 2022, you were a class member. The claim deadline was April 12, 2023.
What Was the Thinx PFAS Lawsuit About?
The Thinx lawsuit alleged that Thinx marketed its period underwear as safe, sustainable, and free from harmful chemicals, but independent testing found PFAS in the products . PFAS, or per- and polyfluoroalkyl substances, are called “forever chemicals” because they do not break down in the body or the environment.
The lawsuit was filed after a 2019 request from Sierra Club magazine led University of Notre Dame physicist Graham Peaslee to test samples of menstrual underwear. The results showed measurable PFAS in the products, which ultimately fueled the lawsuit against Thinx .
The complaint alleged violations of California’s False Advertising Law and other consumer protection statutes, claiming Thinx made false or misleading statements about its products . The lawsuit also challenged the “organic” and “safe” marketing claims.
Thinx denied the allegations. The company stated that PFAS “have never been a part of its product design” and that it requires suppliers to sign agreements attesting that PFAS are excluded from raw materials .
Key Takeaway: The lawsuit alleged PFAS contamination and false marketing claims. Thinx denied the allegations and settled without admitting wrongdoing.
Reality Check: The Thinx settlement was about marketing claims, not about proving that the products caused specific injuries. The scientific evidence on PFAS in period underwear is evolving, but the settlement did not establish that Thinx products harmed anyone. No one will text you Thinx settlement money now. The claim deadline was April 2023, and payments have already been distributed.
What Does the Science Say About PFAS in Period Products?
The science on PFAS in period products has continued to develop since the Thinx settlement. A 2025 study published by researchers at the University of Notre Dame found that 33% of period underwear and 25% of reusable pads tested showed signs of “intentional fluorination,” meaning PFAS were likely added during manufacturing .
The study tested more than 70 reusable menstrual products from multiple markets. It used particle-induced gamma-ray emission (PIGE) spectroscopy to measure total fluorine content in each product layer . The results confirmed that while most products had low PFAS levels, a significant minority contained concentrations suggesting intentional use.
PFAS have been linked to immunosuppression, hormonal dysregulation, developmental delays, low birth weight, high blood pressure in pregnant women, and increased risk of kidney and testicular cancer . The CDC has reported that PFAS have been found in the blood of more than 99% of all Americans .
Thinx maintains that its products are made without PFAS and points to its “Clean Commitment List” and third-party testing as evidence of its safety standards .
Key Takeaway: A 2025 study found that about one-third of period underwear brands showed signs of intentional PFAS use. Thinx says its products are made without PFAS.
What Non-Monetary Changes Did the Thinx Settlement Require?
The Thinx settlement included non-monetary requirements beyond the cash fund. These changes were part of the relief designed to address the marketing claims.
Thinx agreed to disclose the use of antimicrobial treatments and the purpose for which they are used, and to no longer refer to the antimicrobial components of Agion as “non-migratory” . The company also agreed to take “appropriate business measures” to address the claims, though the specific terms are not detailed in the public notice .
The settlement also required Thinx to address PFAS in its manufacturing processes. The company confirmed it “will continue to take measures to help ensure that PFAS are not intentionally added to Thinx period underwear at any stage of production” .
Key Takeaway: The settlement required Thinx to change certain marketing claims and take measures to prevent PFAS from being intentionally added to its products.
What Happens Next
Ongoing: The Thinx settlement is fully resolved. Payments were distributed to class members after the final approval in May 2023. No new claims can be filed.
Ongoing: PFAS research continues. A 2025 Notre Dame study found intentional fluorination in some period underwear brands, and the science on skin absorption and long-term health effects is still developing .
Ongoing: Thinx continues to market its products with a “Clean Commitment List” and third-party testing. The company says its products are made without PFAS .
If you are concerned: If you use period underwear, check the brand’s PFAS testing policies. Some brands now advertise PFAS-free products and publish test results.
Frequently Asked Questions
Is there a Thinx lawsuit settlement in 2026?
Yes, the Thinx lawsuit settled for $5 million in 2023. Final approval was granted on May 24, 2023, and payments were distributed. The settlement is closed .
How much was the Thinx settlement?
The settlement fund was $4 million, with an additional $1 million available if needed to cover valid claims. Total value was up to $5 million .
How much could you get from the Thinx settlement?
Class members could claim up to $21 cash (three pairs at $7 each with proof of purchase) or $10.50 without proof. Alternatively, they could choose a 35% off voucher .
What was the Thinx lawsuit about?
The lawsuit alleged that Thinx marketed its period underwear as safe and sustainable, but independent testing found PFAS in the products. The case settled without Thinx admitting wrongdoing .
Can I still file a claim for the Thinx settlement?
No. The claim deadline was April 12, 2023. That date has passed, and the settlement is closed .
Did Thinx admit that its products contained PFAS?
No. Thinx denied the allegations and stated that PFAS “have never been a part of its product design” .
What are PFAS and why are they harmful?
PFAS are man-made chemicals called “forever chemicals” because they do not break down. They have been linked to cancer, hormonal disruption, and immune system problems .
Are Thinx products still available?
Yes. Thinx continues to sell period underwear and states that its products are made without PFAS. The company publishes a “Clean Commitment List” and third-party test results .
