Lululemon confirmed in April 2026 that PFAS had been used in its durable water repellent products before a phase-out completed in early 2024. The confirmation came in response to a Civil Investigative Demand issued by the Texas Attorney General, who opened a formal investigation into whether Lululemon misled consumers about the chemical composition of its activewear.
For buyers who want to understand the specifics, the investigation surfaces a chemistry question that the activewear industry has largely avoided making legible to consumers. Here is what PFAS actually are, how they end up in workout clothes, what the Lululemon investigation found, and what it means in practice. For a broader view of what toxin-free activewear actually requires beyond any single brand, that framing applies across the category.
What PFAS are
PFAS is an acronym for per- and polyfluoroalkyl substances. The class encompasses several thousand distinct chemical compounds, all sharing a carbon-fluorine bond that makes them exceptionally stable. That stability is why they do not break down in the environment, in water, or in living tissue. The informal name, forever chemicals, is chemically accurate.
The US Environmental Protection Agency's 2024 assessment of PFAS health effects documents links to thyroid hormone disruption, immune suppression, elevated cholesterol, and increased risk of certain cancers in peer-reviewed research. The EPA's current health advisories for PFAS in drinking water reflect a scientific consensus that meaningful exposure at relatively low concentrations carries health implications.
How PFAS end up in activewear
The primary route in activewear is durable water repellent (DWR) treatments. DWR is a finish applied to the outer surface of a fabric after weaving or knitting to cause water to bead and roll off rather than soaking in. It is distinct from the fiber content of the garment. A fabric that lists 87% nylon and 13% elastane on its label may also have a DWR finish that contains PFAS chemistry. That finish is not disclosed in the fiber content label.
Long-chain PFAS compounds, specifically PFOA and PFOS, were the original DWR chemistry of choice across the outdoor and activewear industry. Both have been phased out under regulatory pressure, with PFOA banned by the US EPA and PFOS listed under the Stockholm Convention. The industry shifted to short-chain PFAS alternatives, which were marketed as safer. Subsequent research has raised questions about the long-chain versus short-chain distinction, and several short-chain compounds are now under active regulatory review.
PFAS can also enter garments through other routes: dyes, printing inks, stain repellents, and even water used in manufacturing in regions with PFAS-contaminated water supplies. The DWR application is the most direct and intentional route, but it is not the only one. The full chemical finishing picture, including formaldehyde, phthalates, and heavy metal dyes alongside PFAS, is covered in the research on toxic chemicals in workout clothes.
What the Texas investigation found
The Texas Attorney General's Civil Investigative Demand, dated April 13, 2026, sought documents from Lululemon related to its use of PFAS in activewear products and its public sustainability representations. The investigation focused specifically on whether those representations were materially misleading to consumers.
Lululemon's response confirmed that PFAS had been used in DWR treatments in some products prior to a phase-out completed in early 2024. A parallel class action lawsuit filed in California alleged that consumers made purchasing decisions based on sustainability marketing that did not accurately reflect the presence of PFAS chemistry in the products they bought.
The investigation remains open as of the date of this post. No regulatory findings or judicial conclusions have been issued. What is established is the confirmation of PFAS use through early 2024 and the formal regulatory examination of whether the brand's public representations were consistent with that use. For the full picture on what this means for how non-toxic the brand is overall, whether Lululemon is non-toxic in 2026 works through that question directly.
What the phase-out means for buyers
Lululemon's stated phase-out of PFAS DWR treatments was completed in early 2024. Products manufactured after that transition should not contain intentionally applied PFAS DWR chemistry, assuming the phase-out was comprehensive and supply chain verification is in place.
There are two practical limitations to that assumption. First, retail inventory moves slowly. Products manufactured before the phase-out may remain in stores or in consumers' closets for years. There is no reliable way for a buyer to determine when a specific garment was manufactured from the label alone. Second, intentional PFAS application in DWR is one route of exposure. Other routes through dyes, processing chemicals, and water contamination in the supply chain are not addressed by a DWR phase-out alone.
The gap between a brand commitment and a verified, independently certified claim is the practical problem the Lululemon case makes concrete. A commitment to phase out PFAS DWR is different from a certified PFAS-free finished garment verified by an independent third-party lab. The same framework applies to other brands in the category, as examined in whether Alo Yoga is non-toxic and in the broader context of why we stopped wearing polyester workout clothes.
What verified non-toxic looks like
OEKO-TEX Standard 100 certification tests the finished garment for harmful substances including PFAS compounds, heavy metals, formaldehyde, phthalates, and other regulated chemicals. It is issued by an independent certifying body, not by the brand, and requires periodic re-testing. When a garment carries OEKO-TEX Standard 100 certification, the absence of regulated harmful substances has been independently verified in the finished textile, not just claimed by the manufacturer.
Fiber composition also matters independently of finishing chemistry. TENCEL Lyocell, produced by Lenzing AG through a closed-loop process, achieves its moisture management and breathability through fiber structure rather than through chemical finishing. It does not require DWR treatment to perform in active wear contexts, which removes the primary PFAS exposure route from the production process.
Bellissima's Sempre Leggings use 92% TENCEL Lyocell and carry OEKO-TEX certification on the finished textile. The non-toxic claim is independently verified, not self-asserted.
The broader question the investigation raises
The Lululemon investigation matters beyond any single brand because of what the confirmation implies about the industry. If PFAS chemistry was standard in DWR treatments at the most scrutinized premium activewear brand through early 2024, the reasonable inference is that it was standard across the industry during the same period. The regulatory direction, with PFAS-in-apparel bans now in effect in California and New York and thirty state attorneys general having initiated litigation against PFAS manufacturers by end of 2024, is clearly toward greater restriction.
Buyers who have been making purchasing decisions based on brand wellness positioning have been working with incomplete information. The Lululemon case makes that information gap a formal regulatory and legal matter rather than just a consumer education question. The non-toxic activewear checklist provides a practical evaluation tool to apply this framework to any brand.
Sources
Texas Attorney General. (2026, April 13). Attorney General Ken Paxton Launches Investigation into Lululemon Over Potential Presence of Toxic "Forever Chemicals" in Activewear. texasattorneygeneral.gov.
U.S. Environmental Protection Agency. (2024). Our Current Understanding of the Human Health and Environmental Risks of PFAS. EPA.gov.
OEKO-TEX Association. (2024). OEKO-TEX Standard 100 Testing Criteria. oeko-tex.com.
Stockholm Convention on Persistent Organic Pollutants. (2009). PFOS listing under Annex B. chm.pops.int.
