Asics · Synthetic Athletic Insoles & Orthotics
Asics Performance Insoles 1173a029 - 001 Standard Black White S-o Size
Lower concern. Standard foam insole with no known PFAS-prone features.
Asics does not disclose PFAS treatment on this insole. EVA foam and synthetic textiles are inherently lower-risk materials without waterproofing or stain treatment signals.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
EVA foam, synthetic textile upper
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
Asics Performance Insoles 1173a029 are constructed primarily from EVA (ethylene-vinyl acetate) foam, a lightweight, closed-cell material commonly used in athletic footwear and insoles. EVA is chemically inert and non-toxic once cured; it does not leach harmful compounds under normal foot-contact conditions because it lacks the reactive resin systems or flame retardant chemical loads found in some industrial foams. The synthetic textile upper is a standard polyester or nylon blend with no known sensitizers at typical use temperatures.
The brand's record and disclosure
Asics has not published detailed chemical disclosure or third-party certifications specific to this insole model. The company has faced no public recalls or regulatory warnings tied to insole composition. Asics does not publicly commit to PFAS phase-out in footwear components, though the brand maintains general sustainability statements. For insole-specific safety data, Asics provides minimal transparency beyond basic material naming.
How it compares in its category
EVA insoles are a mainstream, low-hazard choice in the athletic insole category. They avoid the orthopaedic gel-based or polyurethane foam alternatives, which can off-gas volatile organic compounds if low-quality. Compared to cork or leather insoles, EVA requires no tanning chemicals or pesticide residues. This is a standard commodity product with material safety typical for mass-market footwear accessories.
If you buy it
Replace insoles every 6 to 12 months as cushioning degrades with sweat and compression. Wash by hand in cool water with mild soap; do not machine wash or expose to direct heat above 60 degrees Celsius, as EVA can soften slightly. Store in a dry environment to prevent odour and microbial growth. If foam begins to crack, crumble, or emit an unusual odour, discontinue use.
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 resins (textile sizing/finishing)
Synthetic textile uppers may contain trace formaldehyde from fabric finishing, but levels in insoles (minimal textile area, no direct skin contact on most of upper) are below typical health concern thresholds. No specific residue data published for this model.
Azo dyes (synthetic textile colouration)
The black and white dyes used on the textile upper are not identified as restricted azo compounds by Asics or regulatory bodies on public record. Standard athletic shoe dyes are unlikely to pose dermal risk during normal insole use, as contact is brief and indirect.
Antimony in polyester (if present)
If the textile blend includes polyester, antimony trioxide may have been used as a catalyst during synthesis. Antimony is not known to leach from finished polyester textiles under normal wear; no reported cases in footwear insoles.
Volatile organic compound (VOC) off-gassing from foam
EVA foam itself does not off-gas significantly once cured. If odour occurs immediately upon opening, it is typically from packaging or storage conditions, not the material itself, and dissipates within days.
Microorganism growth (moisture retention)
EVA foam can retain sweat and moisture if not dried regularly, creating conditions for bacterial or fungal growth over time. This is a use-care issue, not a manufacturing defect; regular air-drying and replacement mitigate risk.
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 synthetic 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.