Keen · Waterproof Outdoor Accessories
KEEN Men's Composite Toe Waterproof Work Boots
Waterproof work boots; PFAS status unclear. Request materials list.
Keen does not publicly disclose PFAS or water-repellent coating chemistry for this boot model. Waterproof treatment likely present but unspecified. No third-party PFAS testing data available.
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Material
Leather, textile, rubber, waterproof treatment (type unspecified)
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
KEEN Composite Toe Waterproof Work Boots combine leather upper, textile linings, rubber sole, and an unspecified waterproof treatment system. Leather and textiles are common vectors for formaldehyde-based tanning resins and azo dyes used in manufacturing. The waterproof treatment is the critical unknown: many work boot brands use PFAS-based water-repellent coating (water-repellent coating) coatings on textiles and seams, though some now use PFAS-free alternatives. Rubber components are generally lower-risk but can off-gas volatile compounds during curing.
The brand's record and disclosure
KEEN maintains public sustainability commitments but has not published detailed PFAS phase-out timelines or material ingredient lists for specific boot models. The company does not appear on major PFAS-transparency initiatives like the Safer Chemicals in Textiles list. No recalls or established contamination issues are on record for this model. Contacting KEEN directly for waterproof treatment composition is the most reliable next step before committing to purchase.
How it compares in its category
Composite toe work boots in this price range typically use either PFAS-based water-repellent coating, wax treatments, or newer fluorine-free water repellents. KEEN's reputation for durability and comfort is strong, but they are not known for leading transparency on PFAS avoidance compared to specialized brands like Danner (which publishes material specs) or smaller makers offering PFAS-free certified options. Most mainstream work boot brands remain silent on waterproof treatment chemistry, making this product representative rather than exceptional.
If you buy it
Before wearing, request the material safety data sheet (MSDS) for the waterproof treatment from KEEN customer service; this takes days but clarifies PFAS status. Clean and condition leather annually with non-toxic conditioners to minimize residual formaldehyde off-gassing. Inspect textile lining and seams for degradation yearly; worn water-repellent coating can be reapplied with PFAS-free products or wax. Discard boots if leather shows cracking or seams separate, as repairs are rarely cost-effective for work boots.
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.”
Formaldehyde in leather tanning and textile finishing
Leather tanning commonly uses formaldehyde-based resins; textile linings may contain formaldehyde releasers in dyes or sizing. Off-gassing is typically low in finished products but can increase with heat and sweat exposure during work.
Azo dyes in leather and textile coloring
Leather uppers and synthetic textile components are often colored with azo dyes, some of which can break down into carcinogenic amines. KEEN does not publicly commit to restricted substance lists that exclude problematic azo compounds.
Waterproof treatment PFAS contamination
Unspecified waterproof treatment in work boots is a known PFAS vector industry-wide. KEEN's silence on this treatment chemistry is consistent with the broader industry trend but leaves actual risk unquantified for this model.
Rubber sole volatile organic compounds
Synthetic rubber soles can off-gas VOCs including styrene and benzene, especially when new or exposed to heat. This is a minor exposure route in footwear but relevant for workers in enclosed spaces or with extended daily wear.
Antimony in polyester textile linings
If synthetic polyester linings are present, antimony can be used as a catalyst in production. No specific contamination has been reported for KEEN boots, and polyester textile linings typically retain very low antimony residues.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 35% 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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Sea to Summit
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More waterproof outdoor accessories 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.