PFAS score
Allbirds · Hiking Pants
Allbirds Natural Legging Gust Gray Tencel High Waisted Leggings Pants
Lower concern, natural fiber base with no known PFAS triggers, though no explicit brand assurance.
Allbirds' Tencel leggings are made from lyocell (cellulose) and elastane, both natural or regenerated fibers without inherent PFAS risk. The brand does not market water-repellent coating (water-repellent coating) or stain resistance, which are typical PFAS-application triggers in textiles.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Tencel lyocell + elastane blend, natural fibers
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 78% 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 hiking pants 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.