Men's Kaha 3 Low GTX vs Men's Killington Trekker Sneaker Boots: which is safer?
These two grade almost identically. Pick on price and preference; neither has a PFAS edge.
HOKA
Men's Kaha 3 Low GTX
PFAS grade
F 20/100
Overall grade
F 0/100
Verdict
Skip
Hazard flags
⚑ 5
Material
Leather/textile upper with GORE-TEX waterproof membrane
Confidence
45%
PossibleAzo dyes in textile upper
ReportedVOC off-gassing from midsole/adhesives
PossibleChrome tanning residues in leather
Timberland
Men's Killington Trekker Sneaker Boots
PFAS grade
F 20/100
Overall grade
analysis pending
Verdict
pending
Hazard flags
none flagged
Material
Leather, nubuck, rubber sole with waterproof treatment
Confidence
45%
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 hiking shoes & trail runners: see the full ranking