PFAS score
COS · Water-Resistant Swimwear
COS Women's Bonded Swimsuit in Brown | Size: 14
Lower concern for a basic bonded swimsuit, but COS provides no PFAS transparency.
This is a standard bonded nylon/elastane swimsuit with no known water-repellent or stain-resistant finish marketed. Bonded construction alone does not inherently require PFAS. However, COS does not publicly disclose PFAS use or avoidance in swimwear, and no independent testing of this product is publicly available.
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Material
Nylon/polyester blend with elastane (bonded swimwear construction)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
clothing is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
More water-resistant swimwear grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.