Reebok · Synthetic Athletic Insoles & Orthotics
Reebok Stabilize Insole
Lower concern. No PFAS-typical treatment used in insoles.
Reebok Stabilize Insoles use EVA foam and gel, materials not typically treated with PFAS. No brand disclosure on PFAS, but standard insole construction poses lower risk.
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Material
EVA foam, gel cushioning, textile cover
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
Reebok Stabilize Insoles use EVA (ethylene-vinyl acetate) foam as the core cushioning material, topped with a textile cover and gel pockets for shock absorption. EVA foam is a closed-cell polymer that does not readily leach chemicals into skin or sweat under normal room-temperature use. The textile cover may contain dyes and finishes, but insoles sit inside shoes where contact is indirect and migration potential is low.
The brand's record and disclosure
Reebok does not publicly disclose detailed material chemistry or third-party chemical testing for insoles. The brand has faced scrutiny over PFAS use in footwear generally, but insoles (unlike shoe uppers or water-repellent coatings) are unlikely candidates for PFAS treatment. No recalls or safety alerts specific to Reebok Stabilize Insoles are on record in public databases.
How it compares in its category
Insoles are a low-hazard subcategory within footwear because they avoid external water-repellent coatings and heavy metal dyes typical of shoe uppers. EVA foam insoles are the industry standard and pose fewer chemical concerns than gel inserts (which may contain unregulated compounds) or cork-latex blends (which can harbor mold if wet). Reebok's use of EVA with textile covers aligns with mainstream safety practice.
If you buy it
Store insoles in a dry environment to prevent moisture buildup and potential mold growth. Replace them every 6-12 months or when cushioning compresses noticeably, as degraded foam offers no chemical benefit but loses support. Wash the textile cover gently with mild soap and water if needed, and air-dry fully. Do not expose insoles to heat sources (radiators, direct sunlight for extended periods) as EVA can soften, though normal body heat poses no risk.
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 cover
The textile layer may be treated with formaldehyde-based resins for wrinkle resistance or finish durability. Direct skin contact is minimal inside a shoe, reducing exposure risk compared to apparel worn against bare skin.
Azo dyes in textile cover
Colored textile covers could theoretically contain azo dyes; however, insoles experience indirect contact only and azo dye migration is negligible in dry shoe conditions.
Microbial growth from moisture retention
EVA foam itself does not degrade into microplastics under normal wear. Risk lies in mold or bacterial colonization if insoles remain wet for extended periods, a maintenance issue rather than a product design flaw.
Chemical off-gassing from EVA or glues
No documented off-gassing complaints or test results for Reebok Stabilize Insoles. EVA is chemically stable at body temperature and does not typically release volatile compounds in normal conditions.
Heavy metals in pigments
Insole dyes may contain trace metals, but skin contact is minimal and no recalls or published testing identify this as a concern for this product.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 70% 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.