Spenco · Athletic Insoles & Orthotics
Insole, Spenco Sport Cushion Womens 5-11, Implus
Lower PFAS concern. Standard foam insole without clear water-resistant treatment.
Spenco Sport insoles use foam cushioning without disclosed waterproofing or stain treatments. No PFAS disclosure provided by brand, but material composition suggests lower risk.
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Material
Foam cushioning, 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
Spenco Sport Cushion insoles use closed-cell foam cushioning (typically ethylene-vinyl acetate or polyurethane foam) with a textile covering. Foam insoles do not involve glazes, enamels, or ceramic coatings that pose lead/cadmium risk, and closed-cell foam minimizes surface area for leaching. The textile upper may contain minor finishing chemicals, but insole-foot contact is indirect and brief relative to apparel worn against skin for hours.
The brand's record and disclosure
Spenco (Implus Corporation) does not publish detailed chemical disclosure or sustainability certifications specific to this insole line. The brand has no publicly recorded recalls or regulatory actions tied to chemical hazards in this product category. Spenco does not explicitly address formaldehyde resins, azo dyes, or antimony in polyester in available marketing or safety documentation, which is typical for the insole market but means third-party verification is unavailable.
How it compares in its category
Foam insoles are among the lower-risk footwear components; they lack the dye-heavy textile constructions of shoes or the metal hardware that can leach. Competitors like Superfeet and Dr. Scholl's operate under similar opacity regarding chemical inputs. Spenco's lack of premium eco-certification (e.g., Oeko-Tex) is standard in mass-market insoles and does not indicate unusual hazard, only absence of third-party vetting.
If you buy it
Store insoles in a cool, dry place away from direct heat to prevent foam degradation and potential off-gassing of minor volatiles. Replace every 6-12 months or when cushioning visibly compresses, as degraded foam loses support and may shed microparticles. Hand-wash with mild soap and water if needed; avoid prolonged soaking. Monitor for any skin irritation; if rash develops, discontinue and rinse feet with clean water.
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 finishing
Textile upper may contain formaldehyde-based finishes common in low-cost apparel textiles for shape retention and wrinkle resistance. Direct skin contact is minimal (insole worn inside shoe), but off-gassing during warm storage is theoretically possible. No recalls or complaints on record for this product.
Azo dyes in colored textile
If the textile covering is dyed (common in colored insole variants), azo dyes may be present. These can break down to aromatic amines under sweat and friction, though risk is low due to low direct skin contact and minimal sweat migration to insole upper. No reported incidents in this product line.
Foam degradation and microparticle shedding
Closed-cell foam will compress and may shed fine particles with age, especially if exposed to heat or moisture. Inhalation risk is low (particles lodge in shoe), but prolonged use of degraded insoles increases exposure. Not a chemical hazard but a physical integrity concern.
Antimony in polyester components
If any polyester reinforcement is present, antimony trioxide (catalyst) may be used. No public documentation of antimony levels or concerns in Spenco insoles; this is a theoretical risk only if polyester backing is confirmed.
Volatile organic compounds (VOC) off-gassing
Foam cushioning and textile adhesives may release minor VOCs, especially when new or when exposed to heat. Ventilation inside a shoe is limited, but insole use is intermittent (not continuous wear). No strong evidence of unacceptable VOC levels in this product category.
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.