Even R1 Smart Ring vs CZ Smart Interchangeable Leather Smartwatch Strap: which is safer?
Even R1 Smart Ring is our pick, better on PFAS and on the overall hazard picture.
Our pick
Even Realities
Even R1 Smart Ring
PFAS grade
Excellent 85/100
Overall grade
Excellent 77/100
Verdict
Buy
Hazard flags
⚑ 2
Material
titanium, stainless steel, sapphire crystal
Confidence
72%
PossibleBand material variability
PossibleSkin sensitization from sweat pooling
Citizen
CZ Smart Interchangeable Leather Smartwatch Strap
PFAS grade
Excellent 85/100
Overall grade
Good 59/100
Verdict
Skip
Hazard flags
⚑ 4
Material
Leather, stainless steel hardware
Confidence
72%
PossibleChromium (hexavalent) from leather tanning
PossibleFormaldehyde resins in leather finishing
PossibleAzo dyes in leather coloring
Where these two actually differ
- We flag Band material variability and Skin sensitization from sweat pooling on the Even Realities and not on the Citizen.
- We flag Chromium (hexavalent) from leather tanning, Formaldehyde resins in leather finishing, Azo dyes in leather coloring and Bacterial or fungal growth on worn leather on the Citizen and not on the Even Realities.
- The Even Realities is titanium, stainless steel, sapphire crystal where the Citizen is Leather, stainless steel hardware, which is most of the difference in these two grades.
- These two are level, close enough that price and fit should decide it rather than our grade.
Both products run through the same public rubric, which covers 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 water-resistant smart rings & bands, see the full ranking