Women's Nucleo High II GTX vs Men Mephisto Curt Mt SNEAKER: which is safer?
Men Mephisto Curt Mt SNEAKER is our pick: better on PFAS and on the overall hazard picture.
La Sportiva
Women's Nucleo High II GTX
PFAS grade
Bad 20/100
Overall grade
Bad 0/100
Verdict
Skip
Hazard flags
⚑ 4
Material
Gore-Tex membrane (polytetrafluoroethylene-based waterproof layer)
Confidence
45%
LikelyMicroplastic shedding from Gore-Tex membrane
PossibleFormaldehyde-releasing finish resins in textiles
PossibleVolatile organic compounds (VOCs) from adhesives and coatings
Our pick
Mephisto
Men Mephisto Curt Mt SNEAKER
PFAS grade
Good 65/100
Overall grade
Good 59/100
Verdict
Skip
Hazard flags
⚑ 1
Material
leather, textile, rubber sole
Confidence
55%
PossibleVolatile organic compounds (VOC) off-gassing from adhesives
Where these two actually differ
- We flag Microplastic shedding from Gore-Tex membrane, Formaldehyde-releasing finish resins in textiles, Volatile organic compounds (VOCs) from adhesives and coatings and Azo dyes in synthetic textile uppers on the La Sportiva and not on the Mephisto.
- We flag Volatile organic compounds (VOC) off-gassing from adhesives on the Mephisto and not on the La Sportiva.
- The La Sportiva is Gore-Tex membrane (polytetrafluoroethylene-based waterproof layer) where the Mephisto is leather, textile, rubber sole, which is most of the difference in these two grades.
- The gap is 45 points, wide enough that this is not a close call, and the Mephisto is the one to buy.
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 waterproof boots: see the full ranking