Keen · Athletic Insoles & Orthotics
KEEN Men's Utility K-30 Low Arch Insole
Lower concern; no reported PFAS triggers in basic insole design.
Insoles are typically foam or gel padding without water-resistant coatings or fluorinated treatments. Keen does not disclose PFAS information for this product, but standard insole materials pose lower PFAS risk than treated footwear.
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Material
Foam cushioning (EVA or polyurethane base)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
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's K-30 insole uses EVA (ethylene-vinyl acetate) or polyurethane foam as its primary cushioning material, both widely used in footwear and considered chemically stable during normal wear. EVA and polyurethane do not typically off-gas volatile organics at room temperature or during regular foot contact, unlike some expanded foams used in furniture. The arch support structure likely incorporates rubber or thermoplastic elements for durability. No unusual polymer blends or adhesive systems have been reported for this model.
The brand's record and disclosure
Keen has not published detailed chemical safety certifications or third-party testing for individual insole products in public databases. The brand's silence on PFAS in footwear is common across the industry but does not indicate presence or absence. Keen has no documented recalls or safety warnings for this specific insole model. The company maintains general sustainability claims but does not disclose formulation details for foam cushioning.
How it compares in its category
Replacement insoles from major brands (Superfeet, Powerstep, Spenco, Dr. Scholl's) typically use similar EVA or polyurethane bases with rubber top layers. Keen's offering is mid-range in terms of transparency; some competitors offer third-party comfort or biomechanical testing but rarely full chemical hazard profiles. Most aftermarket insoles have no established heavy metal or volatile organic compound issues under normal conditions. The K-30 does not claim antimicrobial or flame-retardant treatments, which reduces chemical complexity.
If you buy it
Replace insoles every 6-12 months depending on wear and odor accumulation; foam cushioning degrades gradually and loses arch support over time. Store in a cool, dry place away from direct heat or sunlight, as sustained high temperatures can degrade EVA. Hand wash with mild soap if moisture or odor develops; do not soak or machine wash. Monitor for foam breakdown, compression, or separation from the backing layer as signs of replacement need.
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.”
EVA/polyurethane off-gassing (volatile organic compounds)
Standard EVA and polyurethane foams used in insoles do not have a documented pattern of significant VOC release at body temperature or during normal foot contact. Off-gassing risk is lower than in new furniture or closed-cell foam products.
Adhesive or binding agent toxicity
Insole construction requires adhesives to bond foam, backing, and any reinforcement layers. Keen does not disclose adhesive type; solvent-based adhesives used in footwear can contain volatile compounds, but exposure during wear is minimal. This remains a data gap rather than a confirmed hazard.
Formaldehyde in textile or rubber components
No public reports of formaldehyde use in aftermarket insole production. The K-30's foam core and top layer do not typically require formaldehyde-based resins, unlike some dyed textiles. Risk is low for this product category.
Antimony in polyester or backing layer
Antimony is used as a polyester catalyst in some textiles and technical fabrics, but aftermarket insoles rarely rely on polyester backing. Keen's K-30 backing material composition is not disclosed; if rubber or EVA-based, antimony risk is negligible.
Microplastic shedding or foam degradation
Over time, EVA foam degrades and can shed small particles into socks and the environment during washing or disposal. This is a known behavior of foam insoles across brands but does not represent a direct health hazard during wear.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% 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.
More athletic insoles & orthotics 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.