Reebok · Synthetic Athletic Insoles & Orthotics
Spenco Propel Performance Insoles
Skip until brand discloses coating composition or test results.
Spenco/Reebok insoles use treated foam for performance features but provide no PFAS disclosure. Waterproof and moisture-management treatments on textiles often contain PFAS; no testing or certification available.
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Material
foam core with proprietary moisture-wicking and cushioning treatments
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
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
Spenco Propel insoles use a polyurethane or EVA foam core paired with proprietary moisture-wicking and cushioning chemical treatments applied to the surface. The exact formulation of these treatments is not publicly disclosed by Reebok, which matters because such coatings commonly contain water-resistant polymers, surfactants, or antimicrobial agents that can leach into sweat or break down under foot heat and friction over time. Foam degradation is normal and expected, but treated foams may release volatile compounds or residual additives as they age, particularly in warm, moist shoe environments.
The brand's record and disclosure
Reebok has not publicly committed to PFAS-free manufacturing across its footwear or accessory lines, and the company does not disclose the specific chemistry of moisture-wicking treatments in performance insoles. The brand has faced pressure from environmental and health advocacy groups on PFAS use in textiles and coatings but has not issued detailed ingredient statements for this product category. Without third-party certification (such as OEKO-TEX or similar) or independent testing, the safety profile of Spenco Propel's treatment chemistry remains opaque.
How it compares in its category
Performance insoles vary widely in treatment philosophy. Some brands (notably Superfeet and Powerstep) disclose their material sourcing more transparently; others rely on proprietary formulations similar to Reebok's approach. Spenco insoles are mid-market in the category and are not known for exceptional transparency compared to premium or eco-focused competitors. Most insoles in this category do not carry heavy-metal contamination risks, but moisture-wicking chemical composition is rarely disclosed across the industry, making Spenco typical in this regard rather than an outlier.
If you buy it
Replace insoles every 12 to 18 months or when cushioning visibly compresses, as foam degradation accelerates chemical leaching potential. Store in a dry, cool place and avoid prolonged exposure to direct heat or intense UV, which can degrade the foam matrix and surface treatments. Ensure feet are clean and dry before use to reduce sweat-driven leaching and microbial growth on the insole. If you experience persistent rashes, odor, or skin irritation, discontinue use and inspect the insole surface for visible breakdown or discoloration.
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.”
Undisclosed moisture-wicking and cushioning treatment chemistry
Spenco Propel's proprietary coatings are not publicly detailed. Such treatments may contain water-resistant polymers, surfactants, or antimicrobial agents; leaching risk increases with foot sweat, heat, and foam degradation over months of use.
Volatile organic compound off-gassing from foam and treatments
No recalls or reports of VOC emission from this specific product are on record. However, polyurethane and treated foam insoles can emit trace volatiles, especially when new or in warm, humid environments; off-gassing typically diminishes after initial wear.
Foam degradation and surface treatment breakdown
Microbial and fungal growth on moist insole surface
While not unique to this product, any cushioned insole can harbor bacteria or fungi if stored wet or worn in damp conditions. Spenco's moisture-wicking design helps prevent this, but occasional cleaning and air-drying are still necessary to minimize risk.
Heavy metals or allergens in dyes or pigments
No testing or recalls for lead, cadmium, or azo dyes in Spenco Propel insoles have been reported. Standard foam insoles are not a typical vector for heavy-metal contamination, but specific colorant or pigment sourcing is not disclosed.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 35% 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.
Safer alternatives in Synthetic Athletic Insoles & Orthotics
Powerstep
Pulse Performance Insoles
EVA foam, gel, fabric blend
Insoles unlikely to contain PFAS, but brand offers no transparency.
⚠Risky category by default
Powerstep
PULSE E
foam insoles, textile upper
No PFAS risk data available.
⚠Risky category by default
Powerstep
PULSE Maxx Orthotic Running Shoe Insert
Foam, fabric, and elastomer blend
No PFAS concern likely, but brand silence limits certainty.
⚠Risky category by default
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.