Stabilize Insole vs Polysorb Cross Trainer Insole: which is safer?

Reebok Stabilize Insole is our pick: better on PFAS and on the overall hazard picture.

Our pick

Reebok

Stabilize Insole

PFAS grade

D 65/100

Overall grade

F 53/100

Verdict

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Hazard flags

⚑ 3

Material

EVA foam, gel cushioning, textile cover

Confidence

70%

PossibleFormaldehyde resins in textile cover

PossibleAzo dyes in textile cover

PossibleMicrobial growth from moisture retention

Why this grade

Spenco

Polysorb Cross Trainer Insole

PFAS grade

D 65/100

Overall grade

F 43/100

Verdict

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Hazard flags

⚑ 4

Material

Polysorb foam cushioning, composition not fully disclosed

Confidence

62%

PossibleFormaldehyde resins in textile covering

PossibleAzo dyes in fabric

ReportedFoam degradation and microparticle release

Why this grade

Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →

More synthetic athletic insoles & orthotics: see the full ranking