Smartwool Review, Is Smartwool Non-Toxic?
Smartwool averages 58 out of 100 on PFAS Authority's PFAS and toxin screen across the 13 Smartwool products graded as of October 2026, and none of them reach its 70 point pass mark.
Smartwool grades Good on our four-band scale. On disclosure, the brand says nothing publicly about PFAS. See what every brand has published about PFAS for how that compares.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
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Does Smartwool have PFAS, by category
Which Smartwool products contain PFAS? Poor and Bad, we’d swap these
- Merino wool blend (primary fiber); no reported water-repellent coating (water-repellent coating) or stain…
- We found no PFAS statement from the brand
- Formaldehyde / VOCs. The nylon and elastane blend components may undergo standard finishing with trace…
2 hazards checked on this product, all on its full breakdown.
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- Merino wool blend, no water repellent finish
- We found no PFAS statement from the brand
- Antimony in polyester. The synthetic content (likely nylon/elastane, not polyester) is minimal; nylon does…
2 hazards checked on this product, all on its full breakdown.
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- merino wool blend (primary fiber)
- We found no PFAS statement from the brand
- Azo dyes (aniline-derived synthetic colorants). Merino socks are dyed during manufacturing; textile dyehouses…
3 hazards checked on this product, all on its full breakdown.
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- Merino wool blend (merino wool, nylon, elastane)
- We found no PFAS statement from the brand
- Azo dyes and colorant allergens. Wool socks are dyed during manufacturing; some azo dyes can release aromatic…
3 hazards checked on this product, all on its full breakdown.
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- Merino wool blend (primary), elastic, synthetic dyes
- We found no PFAS statement from the brand
- Azo dyes in synthetic fiber components. Smartwool does not publish azo dye test results or restricted…
2 hazards checked on this product, all on its full breakdown.
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- Merino wool
- We found no PFAS statement from the brand
- Azo dyes (synthetic colorants). Merino gloves are often dyed with synthetic azo dyes during manufacturing.…
- Merino wool blend (primary natural fiber)
- We found no PFAS statement from the brand
- Synthetic dyes and colorants. Merino socks are dyed using industrial textile processes; azo dyes and…
3 hazards checked on this product, all on its full breakdown.
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- Merino wool blend with synthetic nylon reinforcement
- We found no PFAS statement from the brand
- Heavy metals. The black and colored variants likely use synthetic dyes; Smartwool has not published azo-dye…
3 hazards checked on this product, all on its full breakdown.
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- Merino wool blend, no reported water-resistant treatment
- We found no PFAS statement from the brand
- Antimony in synthetic fibers (nylon/elastane). Antimony oxide is used as a polymerization catalyst in nylon…
3 hazards checked on this product, all on its full breakdown.
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- Merino wool blend, no stated water-repellent treatment
- We found no PFAS statement from the brand
- Antimony in polyester (catalyst residue). Nylon and elastane components do not typically use antimony…
2 hazards checked on this product, all on its full breakdown.
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- Merino wool blend, no specified water-repellent coating treatment
- We found no PFAS statement from the brand
- Azo dyes and synthetic colorants. The specific dyes used in the black or gray colorways are not disclosed by…
3 hazards checked on this product, all on its full breakdown.
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- Merino wool with fleece lining; water-repellent coating treatment unspecified
- We found no PFAS statement from the brand
- water-repellent coating treatment chemistry (unspecified fluorochemicals or alternatives). Smartwool has not…
2 hazards checked on this product, all on its full breakdown.
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- Merino wool with water-repellent coating finish
- We found no PFAS statement from the brand
- PFAS. Smartwool does not disclose whether this product uses legacy fluorocarbon-based water-repellent coating…
2 hazards checked on this product, all on its full breakdown.
Find an alternative on AmazonSmartwool and PFAS, common questions
- Does Smartwool have PFAS?
- Smartwool averages 58 out of 100 on PFAS Authority's PFAS and toxin screen across the 13 Smartwool products graded as of October 2026, and none of them reach its 70 point pass mark. Grades are model-based estimates built from published materials, ingredients and disclosures, not lab tests.
- Is Smartwool non-toxic?
- No Smartwool product we graded reaches Good. The best of them is Smartwool Men's Hike Classic Edition Full Cushion Crew Socks at 65/100.
- Which Smartwool products should I avoid?
- The lowest-graded Smartwool products we have scored are Smartwool Men's Run Cold Weather Targeted Cushion Crew Socks, Smartwool Ridgeway Lined Mitten, Smartwool Women's Run Targeted Cushion Low Ankle Socks. Each one links to the evidence behind its grade.
Every grade uses the same public rubric. How grades work →