Do Reebok sports performance undergarments have PFAS?
Reebok sports performance undergarments average 65 out of 100 on PFAS Authority's PFAS and toxin screen across the 8 Reebok sports performance undergarments graded as of October 2026, above the 59 out of 100 median for the 12 other sports performance undergarments brands graded alongside it.
Reebok sports performance undergarments average Good on our four-band scale. None of them clear our buy threshold. That is above 83% of the sports performance undergarments brands we grade.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
What Reebok says and does about PFAS
We found no PFAS statement from Reebok. One independent lab test by Mamavation on a pair of Reebok running tights found non-detect total fluorine. That is one product, and it is not a finding about the rest of the range.
- Independent testMamavation sent activewear to a lab for total fluorine, an indicator of PFAS. It lists the Reebok RE Tight Running Carrera Tights as non-detect for total fluorine. This is one product. Mamavation, Non-Toxic Activewear Guide ↗
Sources checked September 30, 2026. A brand statement is the company’s own claim, which we report but have not verified. Our grades are model-based estimates, not lab tests.
Graded and flagged Poor and Bad, we’d swap these
Reebok
Men's 7 Pack Performance Boxer Briefs, Medium
- Cotton blend, elastic waistband
- Formaldehyde / VOCs, Cotton-blend basics may use formaldehyde-based resins for wrinkle resistance or sizing.…
3 hazards checked on this product. See all of them.
Reebok
Men's Cooling Performance Boxer Briefs
- Polyester, elastane blend
- Formaldehyde / VOCs, Polyester blends may use formaldehyde-based resins for anti-wrinkle or sizing finishes…
4 hazards checked on this product. See all of them.
Reebok
Men's Featherweight Performance Boxer Briefs
- polyester and elastane blend
- Antimony in polyester synthesis, Polyester is often synthesized using antimony trioxide as a catalyst…
2 hazards checked on this product. See all of them.
Reebok
Men's Tech Comfort Sport Soft Boxer Briefs
- Cotton/synthetic blend, no known treatment
- Azo dyes, Black, navy, and dark colors in mass-market underwear may use conventional azo dyes; Reebok does…
2 hazards checked on this product. See all of them.
Reebok
Mens Boxer Briefs - 6 Pack Big & Tall 7" Inseam Moisture Wicking Performance Mens Underwear Boxers with Contour P
- Cotton/polyester blend, moisture-wicking performance fabric
- Formaldehyde / VOCs, Cotton-polyester blends often receive formaldehyde-based cross-linking finishes during…
2 hazards checked on this product. See all of them.
Reebok
Women's Air Tech Performance Brief Panties 6-Pack
- nylon, spandex, cotton blend
- Formaldehyde / VOCs, Cotton-blend textiles sometimes receive formaldehyde-based wrinkle-resist finishes or…
3 hazards checked on this product. See all of them.
Reebok
Women's Seamless Hipster
- nylon/elastane blend, seamless knit
- Elastane degradation and skin contact, Elastane breaks down over time with exposure to heat, UV, sweat, and…
Reebok
Men's Featherweight Performance Long Leg Boxer Briefs
- polyester/nylon blend with elastane
- Azo dyes and dye residue, Polyester and nylon require synthetic dyes for color. Reebok does not disclose…
3 hazards checked on this product. See all of them.
The same question, asked of the other sports performance undergarments brands
Best average grade first. Reebok averages 65.
See every Reebok product we grade on the Reebok brand page, or the full sports performance undergarments ranking.