PFAS score
Fox River · Performance Socks
Fox River Alturas Wick Dry
Lower concern for PFAS, but brand silence on treatment chemistry leaves some uncertainty.
Fox River Alturas Wick Dry socks are primarily merino wool and synthetic fibers. The 'Wick Dry' treatment is a moisture-management finish typical of performance socks; Fox River makes no public disclosure of PFAS use in this treatment.
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Material
Merino wool blend with Wick Dry moisture-wicking treatment
Brand disclosure
Brand is silent on PFAS
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.
No PFAS disclosure
No public statement about PFAS in this product.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 62% 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.
Safer alternatives in Performance Socks
Smartwool
4-Pack Everyday Athletic Crew Socks
merino wool blend (primary fiber)
Lower PFAS concern for basic merino socks, but Smartwool does not publicly disclose water-repellent coating chemistry.
⚠Risky category by default
Smartwool
Men's Hike Medium Crew Socks
Merino wool blend (primary), elastic, synthetic dyes
Lower PFAS concern for basic wool socks, but no transparency from Smartwool.
⚠Risky category by default
Darn Tough
Men's Run No Show Tab Ultra Lightweight
Merino wool blend
Lower concern; natural fiber socks unlikely to contain PFAS, but brand makes no transparency claim.
⚠Risky category by default
More performance 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.