Medical RX Insole | Green vs Propel + Carbon Performance Insoles: which is safer?
Spenco Medical RX Insole | Green is our pick: better on PFAS and on the overall hazard picture.
Our pick
Spenco
Medical RX Insole | Green
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleFoam degradation and microparticle shedding
PossibleAdhesive or bonding agent residues
PossibleMold or bacterial growth if not maintained
Spenco
Propel + Carbon Performance Insoles
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleFormaldehyde resins in textile finishing
PossibleAzo dyes in textile coloring
PossiblePolyurethane foam degradation and off-gassing
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