PFAS score
Columbia · Waterproof Hiking Socks
Columbia s Hiking Medium Weight Crew Socks
Lower-concern choice for socks; wool blends rarely treated with PFAS, but Columbia does not publicly disclose.
Columbia's hiking socks are primarily merino wool/synthetic blends. Wool socks typically do not require water-repellent finishes that would introduce PFAS risk. No public PFAS disclosure from Columbia on this product, but the material category itself carries lower concern than treated apparel or gear with water-repellent coating coatings.
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Material
Merino wool blend (primary); no reported water-repellent coating
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 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.