PFAS score
Injinji · Performance Socks
Injinji Ultra Run Crew
Lower-concern athletic sock; merino wool reduces PFAS urgency, but water-repellent coating treatment warrant confirmation.
Injinji Ultra Run Crew socks are primarily merino wool blended with synthetic fibers, designed for moisture management in distance running. The brand does not publicly disclose PFAS status or water-repellent coating chemistry.
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Material
Merino wool blend with 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.