Patagonia Men's Granite Crest Rain Pants
A water-repellent or grease-resistant treatment of unstated chemistry, with a brand PFAS statement we have not verified.
Patagonia says 100% of its new products from Spring 2025 are made without intentionally added PFAS. We record that as an unverified brand claim. Its record describes a water-repellent or grease-resistant treatment of unstated chemistry, which is still counted.
Brand says: “Patagonia says 100% of its new products from Spring 2025 are made without intentionally added PFAS.”
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Material
Nylon with water-repellent coating (water-repellent coating) treatment
Brand disclosure
Brand claims PFAS-free
Lab data
No public lab test
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What Patagonia Men's Granite Crest Rain Pants is made of, ingredients and materials
The Granite Crest Rain Pants are constructed from nylon, a synthetic polymer known for durability and lightweight water resistance. The water-repellent coating (water-repellent coating) treatment applied to the fabric is the critical unknown, Patagonia claims PFAS-free status, but the specific chemistry of their proprietary water-repellent coating is not publicly disclosed. Nylon itself is stable and non-leaching under normal wear, but the water-repellent coating is where chemical risk concentrates.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
Waterproof / stain-resistant treatment
Water-repellent coating treatments have historically used PFAS.
water-repellent coating chemistry (unknown composition)
Patagonia claims PFAS-free but has not disclosed what chemical replaces legacy PFAS in this product. Fluorine-free alternatives exist (silicone, paraffin, polyurethane) but toxicity profiles vary; without naming, risk assessment is incomplete.
Coating degradation and microparticle release
As the water-repellent coating ages, washing and wear can cause microscopic flaking or shedding of the treated surface. The composition and fate of these particles are unknown given the undisclosed water-repellent coating chemistry; risk is speculative but present over multi-year use.
What’s reassuring
Brand-stated PFAS-free
The brand states this product is PFAS-free. We have not verified the claim.
Azo dyes in synthetic textiles
No specific azo-dye concerns are documented for Patagonia nylon apparel; the brand uses bluesign processing which restricts certain hazardous dyes, but testing results for this product line are not publicly available.
Formaldehyde / VOCs
Nylon rain garments may use formaldehyde-containing resins for wrinkle resistance or crease-setting; Patagonia does not advertise formaldehyde-free finishes on this product, and no public data confirms presence or absence.
Source, ATSDR ↗Nylon polymer stability under normal use
Nylon is chemically stable in the body and environment at typical temperatures and pH; no leaching of nylon monomers (e.g., caprolactam) is expected under standard wear and washing. This hazard is well-controlled.
How is this PFAS grade calculated?
The brand's record and disclosure
Patagonia has earned a credible reputation for environmental and social accountability, with transparent supply-chain reporting and third-party certifications (Fair Trade, bluesign). However, regarding PFAS, the brand has stated a commitment to PFAS-free treatments but has not published independent verification, third-party test results, or naming of the replacement chemistry for this product line. This is a gap in an otherwise strong disclosure track record.
How it compares in its category
Most mainstream rain pants use either PFAS-based water-repellent coating (the industry standard until recently) or undisclosed proprietary PFAS-free alternatives. Patagonia's position is middle-ground, better than brands making no PFAS commitment, but less transparent than brands naming their chemistry (e.g., wax-based, silicone-based, or fluorine-free alternatives). Few competitors publish equivalent sustainability claims; many do not disclose water-repellent coating chemistry at all.
If you buy it
Wash these pants in cool water with mild detergent and avoid high heat (dryers); hot water and heat can degrade the water-repellent coating and potentially stress the nylon-coating interface. Do not iron or dry-clean. Reapply water-repellent coating treatment every 1-2 years of regular use by using Patagonia's own aftermarket water-repellent coating spray (same chemistry). Inspect seams and fabric for degradation; if the water-repellent coating visibly fails (water no longer beads), re-treat before the coating breaks down entirely.
What is not known about PFAS in this product?
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Patagonia has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
More rain 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.