Adidas · Athletic Insoles & Orthotics
Size 9.5-10m: Adidas Replacement Insole(blue), No Shoes
Lower concern. Standard foam insoles rarely contain PFAS.
Adidas replacement insoles are typical foam products without known water-repellent coating or stain-resistant treatment. No public PFAS disclosures or concerns identified for this category.
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Material
Foam insole, likely EVA or polyurethane
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 insole is almost certainly ethylene-vinyl acetate (EVA) foam or polyurethane (PU), both common cushioning polymers in athletic footwear. EVA and PU do not inherently contain heavy metals, formaldehyde resins, or azo dyes in their base formulations. The blue coloring likely uses synthetic organic dyes, which are typically azo-free in major brand athletic products, though Adidas does not publicly disclose dye specifications for replacement insoles.
The brand's record and disclosure
Adidas has faced scrutiny over PFAS use in performance textiles and waterproofing treatments, but has not disclosed PFAS content in foam insole components. The company has committed to phasing PFAS in apparel by 2025 but provides no transparency on replacement parts. No recalls or documented health incidents tied to Adidas foam insoles are on record.
How it compares in its category
Replacement foam insoles from major athletic brands (Nike, Asics, New Balance) carry equivalent safety profiles; this category is low-risk relative to coated cookware or cosmetics. Off-brand or unbranded foam insoles lack manufacturing oversight and are harder to verify. Adidas replacement parts are generally made in facilities subject to brand quality control.
If you buy it
Store insoles in a cool, dry place to prevent degradation of the foam structure. Do not expose to direct heat sources (radiators, dishwashers, or hot water) as PU can break down and release volatile organic compounds. Replace when foam becomes compressed, loses cushioning, or develops visible cracks, typically every 6-12 months depending on use intensity. Wash with mild soap and cool water if needed; air dry completely before reuse.
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.”
Volatile organic compounds (VOCs) from polyurethane degradation
PU foam can off-gas trace VOCs, especially when new or if exposed to heat. Adidas does not publish VOC emissions data for this product. Risk is minimal in typical indoor use but relevant if worn in very warm environments.
Azo dyes (skin contact from blue coloring)
Major athletic brands typically use non-azo dyes in foam components to meet EU and safety standards. No evidence of azo dye use in Adidas foam insoles, but Adidas does not explicitly certify this product azo-free.
Microplastics shedding
Foam degradation over time can release microplastic particles, especially with high friction or abrasion. Direct skin contact is minimized by shoe lining, but this is a general concern for foam insole products.
Formaldehyde resins in foam bonding
Modern EVA and PU insoles rarely use formaldehyde-based adhesives, having shifted to safer alternatives. No public recalls or warnings for Adidas foam insoles on this basis.
Heavy metals in synthetic dyes or pigments
Cadmium and lead are not typical constituents of modern synthetic organic dyes used in athletic footwear. Adidas supply chain audits generally screen for heavy metals, though specific testing data for this SKU is not public.
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.