The Thinx lawsuit resulted in a $5 million settlement for consumers who bought period underwear marketed as safe and organic. If you purchased Thinx products between November 2016 and November 2022, you may have been eligible for compensation. Payments are in final distribution stages. If you bought Thinx period underwear during the covered period, check your claim status now.
This guide breaks down everything you need to know about the Thinx lawsuit in 2026. You will learn exactly how much claimants received, which products qualified, and what options remain if you missed the original deadline. One sample showed 3,264 parts per million of fluorine, suggesting intentional PFAS use in the manufacturing process. That testing sparked a legal battle that changed how companies market period products.
What Is the Thinx Lawsuit About
The Thinx lawsuit is a class action case alleging the company sold period underwear containing undisclosed PFAS chemicals while marketing products as safe, organic, and nontoxic. The case is pending in the U.S. District Court for the Southern District of New York. The lawsuit involves Thinx Period Underwear and makes allegations regarding the presence of short chain per-and polyfluoroalkyl substances (“PFAS”), Agion anti-microbial treatment, and the organic cotton line of the underwear. The period panty brand 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).
The lawsuit focused specifically on marketing claims, not proven harm to consumers. The class action focused on the way Thinx marketed its products, not the potential for harm.
| Case Detail | Information |
|---|---|
| Case Name | Dickens, et al. v. Thinx Inc. |
| Case Number | 1:22-cv-4286-JMF |
| Court | U.S. District Court, Southern District of New York |
| Settlement Amount | Up to $5 million |
| Final Approval | June 8, 2023 |
Thinx denies all of the allegations made in the lawsuit and denies that Thinx did anything improper or unlawful. With respect to PFAS, Thinx confirms that PFAS have never been a part of its product design.
Thinx Lawsuit Payout Amounts Explained
Thinx settlement payouts range from $3.50 to $21 in cash, depending on proof of purchase and the number of items claimed. With proof of purchase, class members can receive a refund of up to $7 for each eligible purchase of Thinx period underwear. Class members can claim up to three Thinx purchases for a maximum payment of $21 with proof of purchase.
People without receipts could still file claims but received lower amounts. Without proof of purchase, class members can receive a refund of up to $3.50 for each eligible purchase. Class members can claim three eligible purchases for a maximum payment of $10.50 without proof of purchase.
| Claim Type | Per Item | Maximum (3 Items) |
|---|---|---|
| With Proof of Purchase | $7.00 | $21.00 |
| Without Proof of Purchase | $3.50 | $10.50 |
| Voucher Option | 35% off | Up to $52.50 discount |
Top Class Actions readers reported this settlement paying out $10.50 as of July 28, 2023.
Think of it like a store refund, but through the court system. You did not need to prove the underwear harmed you. Just buying the product during the covered period made you eligible.
Thinx Settlement Eligibility Requirements
You qualified for the Thinx settlement if you purchased covered Thinx period underwear in the United States during the class period. The Settlement Class includes all natural persons who purchased, not for resale, the following Thinx Period Underwear in the United States from November 12, 2016 to November 28, 2022.
The purchase had to be for personal use, not resale. Commercial buyers did not qualify. Excluded from the Settlement Class are Thinx; its parents, subsidiaries, affiliates, officers, directors, and employees; any entity in which Thinx has a controlling interest; and any Judge presiding over this Action and the members of the Judge’s immediate family.
Eligibility Checklist:
- Purchased Thinx period underwear for personal use
- Made purchase between November 12, 2016 and November 28, 2022
- Purchased in the United States
- Bought a covered product style
- Not an employee, officer, or affiliate of Thinx
The good news: Thinx agreed to a $4 million class action lawsuit settlement to resolve a class action lawsuit claiming its period underwear is made with dangerous chemicals linked to serious health concerns, and no proof of purchase is required for class members to submit a claim.
Key Takeaway: Even without receipts, eligible purchasers could claim up to $10.50 through the settlement by attesting to their purchases under penalty of perjury.
How to File a Thinx Claim in 2026
The primary Thinx lawsuit deadline for initial claims has passed, but late claim options may still exist in 2026. Check the settlement website for current filing availability.
The original filing process was straightforward. Claimants visited the settlement website, entered their information, and selected their preferred payment method. To file a claim online, head to this page, scroll down and hit the “Start Your Claim” button. After doing so, you will be asked to input your unique claim number and PIN. These numbers can be found on the notice you received about the settlement.
Those without a claim number could still file. If you do not have a claim number or PIN, you can still file a claim by hitting the “Start a New Claim” button.
Original Filing Steps:
- Visit the official settlement website
- Click “Start Your Claim” or “Start a New Claim”
- Enter your claim number and PIN (if received)
- Provide purchase information
- Select payment method: cash, direct deposit, PayPal, or voucher
- Submit under penalty of perjury
Contact the settlement administrator directly to confirm current options.
Thinx Settlement Payment Status 2026
The settlement administrator is processing final payments in 2026.
If you filed a valid claim, payments should have already arrived. Most claimants reported receiving checks in mid-2023. Received a check on Saturday 8/5 for $10.50. Product vouchers will be sent via email unless the claimant opts to receive theirs by mail. Cash benefits from the settlement will be distributed via either direct deposit, PayPal or check, depending on the individual’s preference.
| Payment Timeline | Status |
|---|---|
| Claim Deadline | April 12, 2023 |
| Final Approval | June 8, 2023 |
| First Payments | July/August 2023 |
| 2026 Status | Final distribution phase |
Processing times vary, but most claimants receive payment within 90 days of approval.
If you filed and never received payment, contact the settlement administrator immediately. Lost checks can sometimes be reissued during the final distribution period.
Thinx PFAS Chemicals and the Testing That Started It All
PFAS, or per-and polyfluoroalkyl substances, are synthetic chemicals that do not break down in the environment or human body. They earned the nickname “forever chemicals” for this reason. 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.
The Thinx investigation began when a journalist decided to test her own underwear.An article published in 2020 by Sierra magazine first brought attention to the ingredients in Thinx products. The article’s author, Jessian Choy, had Thinx menstrual underwear and a similar product from another brand tested by Dr. Graham Peaslee, a physics professor at the University of Notre Dame, whose research focuses on PFAS. Peaslee found the presence of PFAS in the Thinx products at “high levels,” “especially on the inside layers of the crotch.”
The levels detected were significant. One pair of Thinx underwear contained 3,264 parts per million, or ppm, and another contained 2,053 ppm. That’s high enough to suggest they were intentionally manufactured with PFAS.
Key Takeaway: Independent testing by a Notre Dame scientist revealed PFAS levels high enough to suggest intentional addition, contradicting marketing claims about product safety.
Thinx Lawsuit Deadline Information
Claims must be filed online or postmarked by April 12, 2023.
That original deadline has long passed. Missing it meant forfeiting the right to payment for most consumers. Original deadlines typically give claimants 90 to 180 days after settlement approval. The Thinx settlement followed this standard timeline.
| Key Date | Event |
|---|---|
| November 2022 | Settlement agreement reached |
| April 12, 2023 | Claim filing deadline |
| April 12, 2023 | Exclusion and objection deadline |
| June 8, 2023 | Final approval granted |
| July/August 2023 | Payments began |
Late claims sometimes get accepted if funds remain. The administrator has discretion here. Missing deadlines typically means forfeiting your right to payment. Mark important dates in your calendar and set reminders.
Thinx Products Covered by the Settlement
Only specific Thinx product styles qualified for the settlement. Not all Thinx items were included. The settlement covers Cotton Brief, Cotton Bikini, Cotton Thong, Sport, Hiphugger, Hi-Waist, Boyshort, French Cut, Cheeky and Thong style Thinx underwear products. The lawsuit settlement includes no admission of wrongdoing by Thinx Inc., which includes the brands Thinx, Thinx Teens and Speax. The two latter brands, Thinx Teens and Speax, were not named in the lawsuit.
Covered Product Styles:
- Cotton Brief
- Cotton Bikini
- Cotton Thong
- Sport
- Hiphugger
- Hi-Waist
- Boyshort
- French Cut
- Cheeky
- Thong
If you purchased a different Thinx product, like their teen line or incontinence products under the Speax brand, those were not part of this particular settlement.
Thinx Proof of Purchase Requirements
Proof of purchase increased your payout but was not required to file a claim. If Thinx does not have a record of your past purchases of Thinx Period Underwear, your Claim Form will require you to provide proof of purchase or attest under penalty of perjury to having made the purchases.
Acceptable forms of proof included:
- Email order confirmations
- Credit card statements
- Bank statements
- Receipts (paper or electronic)
- Screenshots of purchase history
If you have a claim number, the settlement administrator has information regarding your Thinx purchases on file.
Some claimants received notices because Thinx already had their purchase records. These people had the easiest time filing claims. This number can be found somewhere, usually near the top, of your emailed or mailed notice. Keep this number handy, as entering it on the official settlement website will pre-populate the claim form with the information contained in Thinx’s records.
Key Takeaway: Without proof, claimants could still receive $10.50 maximum by attesting under penalty of perjury, but those with documentation received up to $21.
Thinx Settlement Administrator Contact Information
The settlement administrator handles all claim processing, payment distribution, and questions about the case.Dickens et al. v. Thinx Inc. Settlement Administrator P.O. Box 3689 Portland, OR 97208-3689.
Contact Methods:
- Phone: 888-501-8492
- Email: Available through the settlement website
- Mail: P.O. Box 3689, Portland, OR 97208-3689
The law firm representing plaintiffs: Erin Ruben Hunter Bryson Harper Segui Rachel Soffin MILBERG COLEMAN BRYSON PHILLIPS GROSSMAN PLLC.
Contact the administrator if you:
- Filed a claim and never received payment
- Need to update your address or payment information
- Have questions about your specific claim status
- Want to know if late claims are still being accepted
Thinx Class Action Case Details
The formal case name is Dickens, et al. v. Thinx Inc., Case Number 1:22-cv-4286-JMF. The U.S. District Court for the Southern District of New York gave the settlement its preliminary approval in December, more than two years after the litigation began (this case combines two existing lawsuits filed in Massachusetts and California). Thinx consumers united to launch a class action lawsuit in response to the news, and in January 2023, the company agreed to pay up to $5 million to settle. The settlement is the first regarding PFAS in consumer products.
| Legal Detail | Information |
|---|---|
| Lead Plaintiff | Nicole Dickens |
| Case Number | 1:22-cv-4286-JMF |
| Court | S.D.N.Y. |
| Settlement Fund | $4 million base |
| Replenishment Fund | Up to $1 million additional |
| Total Possible | $5 million |
As part of the settlement, Thinx has agreed to pay $4 million into a cash fund to pay Settlement Class Members who submit valid claims, as well as any court approved attorneys’ fees, expenses and service awards to Class Representatives. Thinx has agreed to provide up to an additional $1 million if needed to cover valid claims.
The settlement also included non-monetary terms. Thinx will take measures to help ensure that per- and polyfluoroalkyl substances (“PFAS”) are not intentionally added to Thinx Period Underwear at any stage of production.
PFAS Period Underwear Health Risks
PFAS have been linked to several adverse health conditions including immunosuppression, hormonal dysregulation, developmental delays in children, low birth weight and accelerated puberty, high blood pressure in pregnant women, and an increased risk of some cancers, such as kidney and testicular cancer.
The concern with period underwear is particularly acute because of where the product is worn. Unlike many other consumer products containing PFAS, menstrual and incontinence products are intended for extended contact with genitals, which makes the exposure more concerning. Studies have linked PFAS with issues such as period irregularities, ovarian disorders, high blood pressure in pregnant people, and risk of low birthweight in babies exposed in utero.
Reported PFAS Health Concerns:
- Thyroid disease
- High cholesterol
- Reduced fertility
- Immune system suppression
- Increased cancer risk
- Hormonal disruption
The chemicals are so prevalent that the Centers for Disease Control and Prevention has reported that PFAS, a class of manmade chemicals, have been found in the blood of more than 99 percent of all Americans.
Key Takeaway: PFAS exposure through skin contact with menstrual products is concerning because the groin area has thinner skin that absorbs chemicals more readily.
Thinx Forever Chemicals Testing Results
The original testing that sparked the lawsuit found alarming levels of PFAS in Thinx products. My Thinx “organic” brief and “organic” BTWN Shorty underwear for teens had high levels of per- and polyfluoroalkyl substances (PFAS), especially on the inside layers of the crotch. Some PFAS are associated with cancer, decreased immune response to vaccines, decreased fertility, and more. Exposure to PFAS at even the lowest concentrations has been shown to harm human health. The crotch in my underwear had 3,264 parts per million (ppm), and the one for teens had 2,053 ppm.
Later testing by other groups confirmed broader industry problems. In a series of lab analyses commissioned between 2020 and 2022 by the consumer watchdog site Mamavation and Environmental Health News, 48% of sanitary pads, incontinence pads, and panty liners tested were found to contain PFAS, as were 22% of tampons and 65% of period underwear.
| Testing Source | Finding |
|---|---|
| Sierra Magazine / Notre Dame (2020) | 3,264 ppm in Thinx crotch area |
| Mamavation (2020-2022) | 65% of period underwear tested positive |
| Notre Dame (2023-2025) | 33% of period underwear intentionally fluorinated |
Period underwear (33 percent) and reusable pads (25 percent) had the greatest rates of “intentional fluorination.”
Can You Still File Late Thinx Claims in 2026
The original claim deadline of April 12, 2023 has passed. Your options in 2026 are limited. The primary Thinx lawsuit deadline for initial claims has passed, but late claim options may still exist in 2026. Check the settlement website for current filing availability.
Late claims depend entirely on remaining funds and administrator discretion. If the net cash fund (including the replenishment amount of up to $1 million) is not sufficient to pay all Valid Claims for cash reimbursement, payments to Settlement Class Members who submit a Valid Claim for cash reimbursement will be prorated and the payment amounts may be reduced.
Your 2026 Options:
- Contact the settlement administrator to ask about late claim acceptance
- Check the official settlement website for any announcements
- Watch for any unclaimed funds distributions
If you do nothing, you will not receive anything from the settlement, and you will be legally bound by all orders and judgments of the Court. Unless you exclude yourself, you won’t be able to start a lawsuit or be part of any other lawsuit against Thinx for any claim released by the settlement.
If you missed the deadline and did not opt out, you cannot pursue separate legal action against Thinx for claims covered by this settlement.
Thinx Settlement Voucher Option Explained
Instead of cash, claimants could choose a discount voucher for future Thinx purchases. Voucher: Receive a voucher for a discount of 35% off future purchases of up to $150 of eligible products in a single transaction with a maximum discount of $52.50.
The voucher offered a higher potential value than the cash option.
| Option | Maximum Value |
|---|---|
| Cash with proof | $21.00 |
| Cash without proof | $10.50 |
| Voucher | $52.50 discount |
Vouchers will not be counted in calculating the amount of total Valid Claims.
This means vouchers did not affect how much cash was available for other claimants. The voucher choice only made sense if you planned to keep buying Thinx products despite the lawsuit.
Some consumers found that ironic. Why would you want discounted products from a company you just sued over safety concerns?
Key Takeaway: The voucher option offered up to $52.50 in savings but required buying more Thinx products, which many consumers found contradictory given the lawsuit’s premise.
Similar Period Underwear Lawsuits to Watch
The Thinx case opened the door for similar litigation across the period product industry.Consumers can receive up to $5.30 for up to three pairs of Knix products purchased, for a total of up to $15.90. If the net cash fund of $1.4 million is not sufficient to cover all valid claims, Knix will replenish the fund with up to an additional $600,000. As part of the settlement, Knix has agreed to continue to take measures to help ensure that PFAS are not intentionally added to its products at any stage of production. From 2020 to 2022, three different class action suits in California, Massachusetts, and New York were filed against Thinx. Thinx, which advertises its products as “sustainable” and “eco-friendly,” refutes all of the claims in the lawsuit.
Other Period Product Investigations:
- Knix period underwear (settled)
- Ruby Love (investigated)
- Various tampon brands (ongoing scrutiny)
“This is the first class action case that we are aware of to allege deceptive marketing practices stemming from the presence of PFAS in consumer products,” Erin Ruben, an attorney at Milberg Coleman Bryson Phillips Grossman, stated.
The Thinx settlement set a legal template. Expect more period product lawsuits as PFAS testing becomes more common and consumer awareness grows.
Frequently Asked Questions
Is the Thinx lawsuit settlement real?
Yes, the Thinx class action settlement is a real, court-approved case. A judge granted final approval for this class action settlement on June 8, 2023. The case is pending in the U.S. District Court for the Southern District of New York.
How much money will I get from the Thinx settlement?
Cash payments ranged from $3.50 to $21 depending on proof of purchase.$21 with proof of purchase or $10.50 without proof of purchase. Top Class Actions readers reported this settlement paying out $10.50 as of July 28, 2023.
Can I still file a Thinx claim in 2026?
The original April 12, 2023 deadline has passed.Late claims sometimes get accepted if funds remain. The administrator has discretion here.
Contact the settlement administrator directly to ask about current options.
Do I need proof of purchase for the Thinx settlement?
No, proof of purchase was not required.Thinx agreed to a $4 million settlement and no proof of purchase is required for class members to submit a claim.
However, having proof doubled your maximum payout from $10.50 to $21.
What products are covered by the Thinx lawsuit?
The settlement covers Cotton Brief, Cotton Bikini, Cotton Thong, Sport, Hiphugger, Hi-Waist, Boyshort, French Cut, Cheeky and Thong style Thinx underwear products.
Thinx Teens and Speax products were not included in this settlement.
Final Thoughts
The Thinx lawsuit marked a turning point for period product accountability. The settlement is the first regarding PFAS in consumer products.
If you filed a claim, your payment should have arrived by now. Check with the settlement administrator if something went wrong.
For those who missed the deadline, this case serves as a reminder. Sign up for class action notifications so you never miss another settlement that affects you. The next PFAS lawsuit could be around the corner, and this time, you will be ready.
