PFAS score
Darn Tough · Performance Socks
Darn Tough Men's Ridge Runner Micro Crew Ultra-Lightweight Running Socks
Lower PFAS concern, basic sock without water-repellent or stain-resistant finishes.
Darn Tough's Ridge Runner socks are primarily merino wool with nylon and spandex, materials not inherently PFAS-prone. The brand makes no PFAS claims and the product lacks water-repellent or stain-resistant treatments typically linked to PFAS.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
merino wool blend (wool, nylon, spandex)
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 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.