Is COS PFAS-free?
Across 8 graded products, COS averages F (59/100). On disclosure, the brand says nothing publicly about PFAS. None of its products grade C or better yet. Grades are model-based estimates, not lab results.
Graded and flagged D and F, we’d swap these
COS
Women's Contrast-Trim Swimsuit
nylon/elastane blend swimsuit fabric
Lower-concern baseline, common swimsuit without water-repellent claims, but COS discloses nothing about PFAS practices.
⚠Risky category by default
COS
Women's Bonded-Scuba V-Neck Swimsuit in Red | Size: 6
Bonded scuba neoprene/polyester blend
Lower PFAS concern; bonded scuba is typically untreated, but COS provides no public disclosure.
⚠Risky category by default
COS
Women's Asymmetric Double-Faced Swimsuit
Polyamide (nylon) blend; double-faced woven textile
Lower concern for PFAS, but COS provides no transparency on water-repellent coating treatments or chemical inputs.
⚠Risky category by default
COS
Women's Bonded Swimsuit in Brown | Size: 14
Nylon/polyester blend with elastane (bonded swimwear construction)
Lower concern for a basic bonded swimsuit, but COS provides no PFAS transparency.
⚠Risky category by default
COS
Women's Bonded-Scuba V-Neck Bikini Top
Nylon/polyamide blend (bonded-scuba knit)
Lower PFAS concern, but COS offers no transparency, ask them directly.
⚠Risky category by default
COS
Scuba Swimsuit
polyamide (nylon) or polyester blend
Lower concern, basic swimwear material with no known PFAS triggers, but COS offers no public PFAS transparency.
⚠Risky category by default
COS
Bonded-Scuba V-Neck Swimsuit
Nylon/polyamide blend (bonded construction)
Lower concern; standard swim fabric with no known PFAS triggers, but no brand transparency.
⚠Risky category by default
COS
Women's Bonded-Scuba V-Neck Swimsuit
Polyester scuba-knit bonded fabric with likely water-repellent coating finishing
Skip until COS discloses water-repellent coating treatment chemistry or certifies PFAS-free.
⚠Waterproof or stain-proof treatment
Every grade uses the same public rubric. How grades work →