When someone asks whether their leggings contain PFAS, the first stop is often Reddit. Threads in r/SustainableFashion, r/ZeroWaste, and fitness communities return dozens of comments about forever chemicals in activewear, brand recommendations, and varying levels of concern. The concern is real: PFAS in workout clothes have become a consumer safety question that state regulators are now answering with legislation. This post summarizes what Reddit discussions actually say, then adds the peer reviewed dermal absorption data and regulatory context those threads typically miss.
What is the Reddit consensus on PFAS in workout clothes?
Reddit threads on this topic tend to converge on a few points. Commenters frequently note that moisture wicking, stain resistant, and water repellent finishes often signal the presence of PFAS. PFAS are especially prevalent in activewear because of the tendency for companies to use stain resistant and water repellant (marketed as moisture wicking) coatings. Apparel brands have historically prioritized performance over safety, relying on chemical finishes to deliver quick drying, odor resistant, and easy care garments. However, these benefits often come at the cost of increased chemical exposure.
Commenters regularly suggest switching to cotton or other natural fibers for lower impact workouts. When it comes to activewear, sustainable and non toxic are not always the same thing. Many eco friendly brands use recycled materials, which is a step in the right direction for the planet, but those fabrics can still carry residual chemicals, plastic based fibers, or synthetic finishes that are not ideal for your skin, especially during a workout.
The recurring frustration in these threads: brands do not disclose chemical finishes on the label. Labels might use terms like water resistant, stain repellent, or wrinkle free, which can indicate PFAS treatment.
What does Reddit get right about PFAS exposure?
Reddit's instincts on PFAS in activewear align with published research. PFAS are especially prevalent in activewear because of the tendency for companies to use stain resistant and water repellant (marketed as moisture wicking) coatings. The pattern Reddit commenters describe, where performance language signals chemical treatment, is accurate.
The concern about sweat and absorption is also supported by peer reviewed data. Dermal exposure modeling revealed that sweat markedly increased chemical absorption, up to 3252 fold for PFAS and 835 fold for OPEs, compared to dry contact. This is not speculation. It comes from a study published in Science of the Total Environment in 2025.
Reddit commenters also correctly identify that PFAS free labels alone are not sufficient. PFAS free labels alone do not guarantee skin safety. Truly safer workout clothes are backed by third party testing, transparent materials, and certifications that evaluate the finished garment, not just marketing claims.
What does Reddit miss about the regulatory landscape?
State bans took effect in January 2025
Threads written before 2025 predate the state bans that shifted the legal floor. Bans in California and New York on textile articles and apparel containing per and polyfluoroalkyl substances (PFAS) took effect January 1, 2025. That same day, Colorado commenced its phased approach to prohibit PFAS in outdoor apparel for severe wet conditions, starting with a PFAS disclosure requirement.
No person is permitted to manufacture, distribute, or sell any new textile articles that contain either intentionally added PFAS or levels of total organic fluorine that exceed 100 ppm (which will be reduced to 50 ppm by January 1, 2027) in California.
New York S.1322/A.994 prohibits apparel with intentionally added PFAS. Outdoor apparel for severe wet conditions is exempt until January 2028.
Reddit discussions rarely mention that the exemption for outdoor apparel for severe wet conditions does not cover standard leggings or yoga pants. The exemption is narrow. Standard activewear falls under the ban.
The investigation into Lululemon
Reddit threads frequently recommend or criticize specific brands without citing regulatory actions. The investigation into Lululemon announced by the Texas Attorney General in April 2026 is the kind of enforcement signal those threads should reference.
Attorney General Paxton's investigation will examine whether Lululemon's athletic apparel contains PFAS or forever chemicals that their health conscious customers would not expect based on the brand's marketing. The Office of the Attorney General will also review the company's Restricted Substances List, testing protocols, and supply chain practices to determine whether Lululemon's products comply with its stated safety standards.
Lululemon responded to the investigation. In response to the CID, Lululemon stated that it phased out intentionally added PFAS in all its products in fiscal year 2023. No wrongdoing has been found. But the investigation highlights the gap between wellness marketing and the documentation regulators now expect.
The investigation highlights the growing willingness of state attorneys general to use consumer protection laws to scrutinize chemical disclosures, supply chain practices, and brand messaging in the consumer products space.
The dermal absorption data is more specific than Reddit suggests
Reddit threads often cite general concern about chemicals absorbing through skin. The peer reviewed data is more precise.
A 2024 study from the University of Birmingham assessed dermal absorption of 17 PFAS compounds using 3D human skin models. Of the 17 PFAS tested, the team found 15 substances showed substantial dermal absorption, at least 5% of the exposure dose.
At the exposure doses examined, absorption into the bloodstream of the most regulated PFAS (perfluoro octanoic acid; PFOA) was 13.5% with a further 38% of the applied dose retained within the skin for potential longer term uptake into the circulation.
The sweat amplification factor is substantial. A 2025 study published in Environmental Science and Technology modelling dermal transfer of PFAS from household and children's textiles found that sweat can increase chemical absorption up to 3,252 fold compared to dry fabric contact.
Durable water repellent garments contain approximately three times higher PFAS concentrations than conventional functional items, according to research published in Environmental Science and Technology tracking the fate of PFAS from DWR treated clothing during real world use.
What did independent testing actually find in activewear?
Partnering with EHN.org, the environmental wellness blog and community Mamavation tested the activewear and found levels of fluorine ranging from 10 parts per million (ppm) up to 284 ppm in eight pairs of leggings and pants, out of 32 tested.
Independent testing organization Mamavation commissioned EPA certified lab testing of 32 pairs of workout leggings and yoga pants. The results found organic fluorine (a PFAS indicator) in 8 of 32 pairs tested, ranging from 10 ppm to 284 ppm. The highest reading came from LulaRoe leggings. Lululemon and Athleta products also showed detectable fluorine in that testing round.
Not all brands tested positive. Based on published independent testing: Alo, Reebok, Nike, Sweaty Betty, and Under Armour showed zero organic fluorine in Mamavation's leggings testing.
Patagonia has eliminated intentionally added PFAS from all new products as of Spring 2025. Levi Strauss earned an A+ in the NRDC's 2024 PFAS scorecard for already removing PFAS from its supply chain.
Are the state bans actually working?
Early data suggests yes. The clearest evidence that these laws are actually working comes from NRDC, which bought and tested 115 textile products in California and New York in 2025. Among the 46 rainwear, athletic pant, swimwear, and footwear items in that sample, 38 measured under 10 parts per million, and only two exceeded the state's new 100 ppm threshold. That is a striking signal that state bans are reaching all the way into the supply chain, not just the label.
What should Reddit users actually look for?
Based on the evidence, here is what to verify before purchasing:
- Does the brand publish total organic fluorine test results? A PFAS free claim without a test report is unverified.
- What is the threshold? California's limit is currently 100 ppm, dropping to 50 ppm in January 2027. Ask whether the brand meets the stricter standard.
- Which lab performed the testing? EPA certified labs or OEKO-TEX accredited facilities provide credible third party verification.
- Does the brand specify that PFAS were not intentionally added? This is the language New York requires. If a brand cannot confirm this, it may not be compliant.
- Are water repellent or stain resistant finishes applied? Claims such as water resistant, odour resistant and stain resistant can often signal the presence of PFAS coatings.
For a deeper look at how these questions fit into a material sourcing strategy, see the plastic-free activewear guide.
What should a brand founder ask their supplier?
If you are developing an activewear line, the Reddit conversation is consumer facing. The sourcing conversation requires different questions:
- Does your facility use any fluoropolymer based finishes, including C0 DWR? Even short chain C0 DWR chemistry is technically PFAS under most state definitions.
- What is the total organic fluorine (TOF) level on the finished garment? The California threshold drops to 50 ppm in January 2027. Ask for the test report, not a claim.
- Which lab performed the testing, and is the report available for publication? If the supplier cannot share the report, you cannot verify the claim.
- Are you compliant with New York S.1322 and California AB 1817? If the supplier does not know what these laws are, that is a signal.
- What is your Restricted Substances List, and does it cap total organic fluorine? In response to the CID, Lululemon stated that it phased out intentionally added PFAS in all its products in fiscal year 2023. Although the company outsources its manufacturing, it maintains a strict Restricted Substances List (RSL) consistent with the 2025 Apparel and Footwear International RSL Management (AFIRM) Group, caps total organic fluorine at 50 ppm. That is the floor a serious brand should match.
What does PFAS free actually require in 2026?
The phrase PFAS free is not regulated at the federal level. State laws define compliance thresholds:
- California: Total organic fluorine below 100 ppm (dropping to 50 ppm January 2027) and no intentionally added PFAS.
- New York: No intentionally added PFAS in apparel.
- Maine: No intentionally added PFAS in textile articles as of January 2026.
- Colorado: Disclosure labels required, with a full ban on outdoor apparel for severe wet conditions by January 2028.
The total organic fluorine threshold drops from 100 ppm to 50 ppm in January 2027.
What does this mean for the next 24 months?
For brands, the shift is from voluntary claims to enforceable thresholds. For consumers, the shift is from trusting labels to asking for test reports. Reddit threads will continue to surface this question. The answer is now written into law.
OHZEHN-TEX(TM) publishes test reports for every lot shipped. That is the standard the regulatory floor is moving toward.
Sources
https://www.thegoodtrade.com/features/pfas-free-clothing/ https://vibrantbodycompany.com/blogs/education/workout-clothes-without-pfas https://www.sciencedirect.com/science/article/abs/pii/S0048969725020662 https://fibercheck.app/blog/are-gym-clothes-toxic-pfas-bpa-chemicals-activewear/ https://www.texasattorneygeneral.gov/news/releases/attorney-general-ken-paxton-launches-investigation-lululemon-over-potential-presence-toxic-forever https://www.foley.com/p/102mq7l/texas-attorney-general-investigates-lululemon-over-alleged-forever-chemicals-in/ https://pfas.pillsburylaw.com/texas-ag-investigate-pfas-lululemon/ https://orbasics.com/blogs/stories/pfas-in-workout-clothes https://www.urbanwellnessmag.com/blog/nontoxic-activewear https://www.minderoo.org/stories/pfas-activewear/ https://www.morganlewis.com/pubs/2024/11/new-york-and-california-bans-on-pfas-in-textiles-and-apparel-begin-january-1-2025 https://www.venable.com/insights/publications/2024/10/fashion-industry-beware-pfas-bans-on-apparel https://www.bluesign.com/pfas-in-clothing https://impakter.com/pfas-no-more-state-bans-and-regulations-are-detoxing-american-clothing/ https://www.birmingham.ac.uk/news/2024/new-study-confirms-forever-chemicals-are-absorbed-through-human-skin-1 https://phys.org/news/2024-06-chemicals-absorbed-human-skin.html https://www.ehn.org/pfas-clothing https://mamavation.com/product-investigations/non-toxic-activewear-guide-pfas-workout-leggings-yoga-pants.html https://www.ewg.org/news-insights/news/2022/01/new-tests-find-toxic-forever-chemicals-bedding-yoga-pants-and-other