Merrell · Stain-Resistant Footwear
NikWax Fabric & Leather Duo-Pack
Unknown PFAS content in waterproofing treatment; skip until tested.
Nikwax products treat fabrics and leather with water-repellent coating (water-repellent coating) coatings. Brand does not disclose PFAS status or chemistry of treatment formulas.
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Material
fabric and leather waterproofing treatment
Brand disclosure
Brand is silent on PFAS
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.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
NikWax Fabric & Leather Duo-Pack is a topical waterproofing treatment, not a garment itself. The fabric formula is typically a wax-based emulsion applied to synthetic or natural fibers; the leather formula is a conditioning wax. Neither product is worn directly against skin in normal use, which limits dermal exposure. The active waterproofing agents are the critical unknown: NikWax has historically used wax and resin blends, but modern fabric treatments often include synthetic water-repellent chemistry (potentially PFAS-based) not fully disclosed on consumer labels.
The brand's record and disclosure
Merrell (parent: Wolverine Worldwide) has not made public commitments to PFAS-free waterproofing treatments and does not transparently list active ingredients for NikWax products on retail packaging or websites. NikWax itself markets as a 'natural' treatment but makes no third-party verified claims about PFAS absence. The brand's silence on this specific issue, combined with the product's waterproofing function, leaves PFAS content unconfirmed. No major recalls or safety violations for this specific product line are on public record.
How it compares in its category
Fabric waterproofing treatments fall into two camps: PFAS-based (very durable, now restricted in some jurisdictions) and PFAS-free alternatives (wax, silicone, polyurethane-based). NikWax is marketed as a mid-tier consumer option. Competitors like Granger's and Sawyer explicitly state PFAS-free formulas; others remain silent like NikWax. For leather conditioning, wax-based treatments are lower-risk than synthetic coatings, assuming no heavy metal dyes in the leather itself (not tested here).
If you buy it
Apply in a well-ventilated area; avoid inhaling spray or aerosol mist if that is the format. Use only as directed on the label, which typically means light topical application to dry fabric or leather outdoors or in open air. Do not heat-treat fabric after application (tumble drying on high may alter the coating). Reapply annually or when water beading diminishes. Wash hands after use. Store in a cool, dry place away from children and pets. Before purchasing, contact Merrell directly requesting complete ingredient disclosure and PFAS testing results.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Volatile organic compounds (VOCs) during application
Wax and resin-based treatments can off-gas solvents during drying. Not typically hazardous at recommended ventilation levels, but sensitive individuals (pregnant women, young children, respiratory conditions) should avoid enclosed spaces during application.
Inhalation risk from spray or aerosol format
If this product is sold as a spray or pressurized can, inhalation of fine droplets is possible, particularly if applied indoors. Liquid and paste formats carry lower inhalation risk. Check product format before purchase.
Skin irritation from direct contact
No reported incidents of dermatitis or sensitization from NikWax topical application at recommended use rates. Risk is minimal since treatment is applied to fabric/leather, not skin. Accidental hand contact is unlikely to cause harm with normal washing.
Heavy metals in leather treatment residue
Leather conditioning waxes typically do not contain toxic metals if sourced from reputable suppliers. No public recalls or contamination reports for NikWax leather formula exist. Risk depends on the lead or cadmium content of the leather itself, not the treatment.
Formaldehyde or formaldehyde-releasing preservatives
Wax-based waterproofing treatments do not typically require formaldehyde-releasing biocides. No evidence or disclosure suggests formaldehyde is present in NikWax formulas. This hazard is unlikely for this product class.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 45% 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.
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More stain-resistant footwear 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.