PFAS score
Patagonia · Waterproof Hiking Socks
Patagonia Yulex Wading Socks
Lower-concern choice, Patagonia explicitly avoids PFOA/Teflon-type coating in Yulex socks.
Patagonia's Yulex Wading Socks use synthetic rubber (Yulex) with polyester, and the brand openly states it does not apply PFOA or Teflon-type coating water-repellent coatings. Yulex production carries Bluesign certification, reflecting stricter chemical controls.
Brand says: “Patagonia Yulex products are manufactured without PFOA or PTFE durable water repellent (DWR) treatments.”
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Material
Yulex (synthetic rubber) with Polyester blend
Brand disclosure
Brand claims PFAS-free
Lab data
No public lab test
Why this grade
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
Category baseline
clothing is a category where PFAS exposure is more common.
Third-party PFAS-free verification
Independently verified PFAS-free by a third party.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 82% 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.
Formulations and coatings change between production runs. Always check the current label before buying.
More waterproof hiking socks 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.