Athleta has positioned sustainability at the center of its brand identity for longer than most activewear companies. It holds B Corp certification, publishes an annual impact report, and has made public commitments on responsible materials. For a buyer trying to determine whether Athleta is a genuinely non-toxic choice, those signals carry some weight. They also require context to interpret correctly.
What Athleta is made of
Athleta's product line spans a wide range of fabric compositions. Its performance lines use nylon and polyester blends, similar to the mainstream activewear industry. Some lines incorporate recycled polyester, which addresses a supply chain concern about virgin petroleum use but does not change the in-use properties of the fiber. Recycled polyester performs identically to virgin polyester, sheds microplastic fibers during washing at similar rates, and carries the same potential for chemical finishing treatments.
Research published in Environmental Science and Technology by Browne et al. (2011) established that synthetic garments release plastic fibers during laundering that accumulate in marine environments. A 2022 study by Leslie et al. in Environment International detected microplastic particles in human blood samples. Recycled polyester reduces the supply chain footprint without addressing the in-use shedding or skin-contact questions that are relevant to the non-toxic evaluation.
Athleta has also incorporated Tencel-branded fibers in some product lines. When Tencel Lyocell is present in a garment, the closed-loop production process and fiber properties that distinguish it from synthetic alternatives apply to that component of the blend.
What Athleta's sustainability certifications cover
B Corp certification evaluates a company's overall social and environmental performance across governance, workers, community, and environment. It is a meaningful business-level credential. It is not a chemical safety certification for finished garments. B Corp status does not mean Athleta's products have been independently tested for PFAS, phthalates, formaldehyde, or other harmful substances in the finished textile.
Athleta has made commitments under the Responsible Business Coalition and has published restricted substances lists as part of its supplier requirements. A restricted substances list (RSL) is a commitment to suppliers about what should not be used in production. It is a brand-level policy document, not an independent third-party certification of the finished product. The distinction matters because RSL compliance depends on supply chain enforcement, which varies in rigor across manufacturers and is not independently verified at the garment level in most cases.
The PFAS question specifically
The April 2026 Texas Attorney General investigation into Lululemon established through Lululemon's own confirmation that PFAS chemistry was used in durable water repellent treatments in that brand's products through early 2024. The investigation is significant because it makes explicit what was previously undisclosed about industry practice during a period when wellness marketing was active across the category.
Athleta, like most performance activewear brands, has used DWR treatments on some product lines, particularly outerwear and weather-resistant pieces. Athleta has stated commitments to phase out fluorinated DWR chemistry. The status of independent verification of those commitments at the finished-garment level is not publicly documented in a form that allows consumer confirmation.
The question is not whether Athleta's sustainability commitments are genuine. They appear to be more developed than most brands in the category. The question is whether those commitments have been independently verified at the level of the finished garment rather than the supplier policy level.
What independently verified non-toxic looks like
OEKO-TEX Standard 100 is the relevant standard for finished-garment chemical safety verification. It requires independent laboratory testing of the finished textile for a comprehensive list of regulated harmful substances, including PFAS compounds, heavy metals, formaldehyde, phthalates, and azo dyes. Certification is issued by the testing body, not by the brand, and requires periodic renewal.
A garment carrying OEKO-TEX Standard 100 certification has been independently tested and confirmed to meet the standard for that list of substances. That is different from a brand stating that its suppliers are prohibited from using those substances.
Fiber selection also affects the chemical finishing requirement. Fabrics like TENCEL Lyocell achieve moisture management and breathability through fiber structure, not through applied chemical finishes, which means DWR treatments are not required for performance. Removing the need for DWR treatment removes the primary route through which PFAS enter activewear.
Bellissima's Sempre Leggings use 92% TENCEL Lyocell and carry OEKO-TEX Standard 100 certification on the finished textile. The non-toxic claim is independently verified at the garment level, not derived from a supplier policy document.
A fair assessment
Athleta is meaningfully more transparent about sustainability than most activewear brands. Its B Corp certification, restricted substances commitments, and published impact reporting represent real work that most competitors have not done.
For buyers whose primary concern is confirmed absence of harmful substances in the finished garment they are wearing during exercise, the relevant question is whether those commitments have been independently verified at the finished-garment level with a named certifying body and a published certificate number. That level of verification is what distinguishes a confirmed non-toxic claim from a credible policy commitment.
Those are different things. Knowing the difference allows for an accurate evaluation rather than one based on brand positioning alone.
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.
Browne, M.A., et al. (2011). Accumulation of microplastic on shorelines worldwide: Sources and sinks. Environmental Science and Technology, 45(21).
Leslie, H.A., et al. (2022). Discovery and quantification of plastic particle pollution in human blood. Environment International, 163.
OEKO-TEX Association. (2024). OEKO-TEX Standard 100 Testing Criteria. oeko-tex.com.
