PFAS score
Thorlo · Performance Socks
Thorlos Men's Thorlo Running Mini Crew Socks
Lower PFAS concern, plain athletic socks with no Teflon-family coating or water-repellent coating treatment apparent.
Thorlos running socks appear to be standard acrylic/nylon/spandex blends with no advertised water-repellent, stain-resistant, or nonstick finishes that would typically introduce PFAS. The brand makes no PFAS claims, but the product design and category pose minimal inherent risk.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Acrylic, nylon, spandex blend (standard athletic socks, no special coatings noted)
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.