Asics · Synthetic Athletic Insoles & Orthotics
Asics Insoles Replacement Shoes Performance Sockliner Extra Wide Men
Lower concern; basic insole foam typically PFAS-free.
Asics replacement insoles use standard foam and textile, common cushioning materials without known PFAS risk. No treatment claims, water resistance, or stain resistance noted on product.
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Material
Foam cushioning, textile sockliner
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
This product combines foam cushioning (likely polyurethane or EVA) with a textile sockliner covering. Foam insoles are designed for shock absorption and comfort rather than long-term chemical release; the material is inert once cured and not heated during normal wear. The textile layer is typically a polyester or cotton blend; contact with skin is brief and indirect. No coating, glaze, or reactive finish is involved, which eliminates many common chemical pathways.
The brand's record and disclosure
Asics does not publicly disclose detailed chemical composition or third-party certifications for insole materials on product packaging or websites reviewed. The brand has not faced recalled or reported safety issues specific to replacement insoles. Asics' general footwear compliance is governed by standard apparel and shoe safety regulations (CPSIA, REACH) but transparency around flame retardants or antimony in polyester is limited.
How it compares in its category
Replacement insoles as a category carry lower chemical risk than full footwear because they avoid dyes, adhesives, and complex assembly. Asics' foam sockliner is mainstream; premium competitors (Superfeet, Powerstep) often advertise antimicrobial treatment or special materials but lack significantly better disclosure. Budget insoles and unbranded foams offer no advantage in transparency and may have lower quality control.
If you buy it
Store in a cool, dry place away from direct heat or sunlight to prevent foam degradation. Wash the textile layer by hand in mild soap and water if needed; do not machine wash or dry-clean. Replace every 6-12 months depending on use intensity, as foam loses cushioning over time rather than leaching chemicals. Inspect for visible breakdown, odor, or staining before each use; discard if the foam begins to crumble or feels damp.
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 in textile sockliner
Replacement insole textiles are typically not treated with formaldehyde-releasing finishes; Asics does not advertise such treatment, and no field reports exist for this product line.
Azo dyes in polyester sockliner
If the textile layer is dyed polyester, azo dyes may be used. Asics does not specify dye chemistry; risk is minimal on an insole since contact is indirect and duration is limited, but specific color or origin is not disclosed.
Antimony in polyester fiber
Polyester production can involve antimony as a catalyst; Asics does not confirm or deny use. Exposure from an insole is extremely low because antimony is bound within the polymer matrix and not released during wear.
Flame retardants in foam
Replacement insole foams are not typically treated with flame retardants because they are not classified as textiles under most regulations. No evidence of treatment in this product or category.
Foam degradation and particulate release
Over months to years, polyurethane or EVA foam may crumble or shed small particles, especially if exposed to moisture or heat. This is a durability issue rather than a chemical hazard, but replacement every 6-12 months mitigates any exposure.
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.