PFAS score
Houdini · Hiking Pants
Patagonia Men's Houdini Rock Climbing Pants
Lower-concern choice, Houdini and Patagonia both phased out PFAS-based water-repellent coating and use third-party verified alternatives.
Houdini (owned by Patagonia) explicitly replaced PFAS-based water repellents with Houdini Dry, a PFAS-free alternative, several years ago. This product carries Bluesign® and OEKO-TEX certifications, both of which restrict PFAS use. No public lab data exists, but the brand's commitment and certification history support lower concern.
Brand says: “We have eliminated PFAS-based water repellents from our products. Our Houdini Dry treatment is PFAS-free.”
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Nylon with water-repellent coating treatment (Houdini Dry)
Brand disclosure
Third-party verified PFAS-free
Lab data
No public lab test
Why this grade
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
Category baseline
clothing is a category where PFAS exposure is more common.
Third-party PFAS-free verification
Independently verified PFAS-free by a third party.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 82% 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.
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.