PFAS score
Allbirds · Hiking Pants
Allbirds Women's Natural Leggings Grey Small - New Women | Color: Grey | Size: S
Lower PFAS concern, natural leggings without performance coatings, but Allbirds has not publicly disclosed PFAS testing.
Allbirds' Natural Leggings appear to be made from untreated natural fibers without water-repellent or stain-resistant finishes, which eliminates the most common PFAS application pathways in apparel. However, Allbirds does not publicly commit to PFAS-free sourcing or third-party verification for this line, leaving a transparency gap.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Natural fibers (likely merino wool blend or plant-based), no water-repellent finish
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.