Keen · Waterproof Outdoor Accessories
10.5oz Silicone-repellant Boot Protector
Skip pending disclosure. PFAS risk unknown for silicone water-repellent coating.
Keen does not disclose PFAS use in this silicone-repellant boot protector. Silicone-based water repellents may contain PFAS; brand silence limits assessment confidence.
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Material
Silicone repellant coating on fabric
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
This boot protector uses a silicone-based water-repellent (water-repellent coating) coating applied to a fabric substrate. Silicone water-repellent coating differs chemically from legacy fluorocarbon coatings (PFC/PFAS), but manufacturers rarely disclose whether the formulation contains PFAS-free alternatives or legacy compounds. The silicone resin itself is inert once cured, but the manufacturing process and any processing aids are the real question.
The brand's record and disclosure
Keen has not made public commitments to PFAS-free water-repellent coating chemistry or released third-party test results for this specific product line. The company is silent on water-repellent coating sourcing for textile accessories, which is typical industry-wide but represents a gap in transparency. Keen does market some footwear with eco-certifications, but boot protectors are not covered under those programs.
How it compares in its category
Silicone water-repellent coating is increasingly common in mid-market outdoor gear as a PFAS alternative, but adoption is inconsistent. Premium brands like Patagonia and Arc'teryx now label PFAS-free water-repellent coating explicitly; budget and mid-tier brands rarely do. For a 10.5 oz accessory, the coating represents a small total exposure compared to waterproof jackets or pants, reducing absolute risk even if PFAS is present.
If you buy it
Wash separately in cool water with mild detergent; avoid bleach and fabric softeners that can degrade the water-repellent coating. Do not machine dry on high heat, as silicone coatings can soften above 60°C. Reapply water-repellent treatment every 1-2 years if the product begins to bead water poorly. Before repurchase, contact Keen directly to request water-repellent coating chemistry disclosure; if they remain silent, consider brands with explicit PFAS-free claims.
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.”
PFAS in water-repellent coating (fluorocarbon or legacy chemistry)
Silicone-repellant branding does not guarantee PFAS absence. Keen has not disclosed the specific water-repellent coating chemistry or supplier; legacy formulations sometimes blend PFAS into silicone systems.
Formaldehyde resins in fabric finishing
No recalls or test reports of formaldehyde in Keen textile accessories. Most major outdoor brands have phased out formaldehyde finishes, but material composition is rarely disclosed publicly.
Azo dyes or heavy metals in pigments
Keen footwear is not flagged for azo dye or metal contamination in available databases. Absence of public reports does not rule out low-level exposure; testing is typically third-party only.
Coating degradation and microfiber release
Silicone water-repellent coating coatings degrade with age and washing, potentially shedding microfibers into wash water. No quantified risk exists for this product specifically, but the hazard is inherent to synthetic water-repellent coating layers on textiles.
Plasticizer leaching from synthetic components
Boot protectors typically do not contact skin or food and are not heated above 60°C in normal use, minimizing leaching risk. Phthalates or BPA in adhesives or seams are not documented for this product line.
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.
Safer alternatives in Waterproof Outdoor Accessories
Sea to Summit
Ultra- Sil Stuff Sack Set
Ultra-Sil nylon fabric, no water treatment applied
Stuff sack with no waterproofing treatment.
⚠Risky category by default
Arc'teryx
Index Gear Organizer
Nylon or polyester fabric organizer
Minimal PFAS risk likely, but Arc'teryx provides no public disclosure.
⚠Risky category by default
Sea to Summit
Ultra-Sil Pack Cover
nylon with silicone water-repellent coating
PFC-free claim stated. No independent verification available yet.
⚠Waterproof or stain-proof treatment
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.