PFAS score
Smartwool · Sports Performance Undergarments
Smartwool Men's Run Zero Cushion No Show Socks
Lower concern. Merino wool socks unlikely to contain intentional PFAS.
Smartwool socks are primarily merino wool with nylon reinforcement, both inherently PFAS-free materials. No water-repellent coating or stain treatment reported, reducing PFAS risk significantly.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Merino wool blend, no reported water-resistant treatment
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
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 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 sports performance undergarments 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.