Does Citizen water-resistant smart rings & bands have PFAS?
We graded 8 Citizen water-resistant smart rings & bands products, averaging Excellent (79/100). 7 of them grade Good or better. Against the other 11 water-resistant smart rings & bands brands we grade, where the middle brand sits at 85/100, Citizen is worse than typical.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Citizen water-resistant smart rings & bands worth buying Good or better, best-graded first
Citizen
CZ Smart Interchangeable Stainless Steel Smartwatch Bracelet
Stainless steel, no coating disclosed
Nickel release (from stainless steel alloy)
Stainless steel watchbands contain 8-12% nickel by design. While corrosion resistance is…
Corrosion and metal oxidation
Saltwater, chlorine, and acidic sweat can gradually corrode stainless steel over months…
Alloy composition variability and undisclosed materials
Citizen does not publish detailed alloy specifications or third-party verification of…
Stainless steel bracelet with no coating disclosed.
⚠Brand says nothing about PFAS
Citizen
CZ Smart Interchangeable Leather Smartwatch Strap
Leather, stainless steel hardware
Chromium (hexavalent) from leather tanning
Leather tanning method unknown for Citizen straps. Chrome tanning can retain trace…
Formaldehyde / VOCs
Leather finishes sometimes contain formaldehyde-releasing resins to improve water…
Azo dyes in leather coloring
If dyed leather is used (likely for colored straps), azo dyes pose theoretical skin…
Bacterial or fungal growth on worn leather
Leather worn daily on skin provides warm, moist microenvironment. Poor drying after…
Leather unlikely to contain fluorochemical treatment.
⚠Brand says nothing about PFAS
Citizen
Promaster Sea Silicone Watch Band
Silicone watch band with water resistance
Waterproof coating composition (unspecified Teflon-family coating or similar)
Citizen does not disclose the chemical basis of the water-resistance treatment. If…
Skin irritation or allergic response to silicone or additives
Silicone allergies are rare but documented in sensitive individuals. This band's risk is…
Coating degradation and microparticle release over time
Water-resistant coatings can flake or delaminate with age, heat, or salt exposure. Risk…
Silicone base likely lower concern with unspecified waterproof treatment.
⚠Brand says nothing about PFAS
Citizen
CA4154 Eco-Drive Silicone Watch Band
Silicone elastomer band
Microplastics
Extended UV exposure or mechanical stress may cause surface cracking or micro-tears over…
Skin irritation from contaminants
Silicone itself is hypoallergenic, but trapped sweat, bacteria, or mold in band crevices…
Silicone watch band rarely uses PFAS, no concerns identified.
⚠Brand says nothing about PFAS
Citizen
Rubber Band Strap
rubber elastomer strap
Volatile organic compound off-gassing
New rubber products may emit minor VOCs (odor, not toxicity concern) for the first few…
Rubber strap typically PFAS-free but brand makes no disclosure.
⚠Brand says nothing about PFAS
Citizen
Navihawk Eco-Drive Silicone Watch Band
silicone rubber band
Silicone degradation and microparticle shedding
Over years of heavy use, silicone can develop microscopic tears or flaking, particularly…
Bacterial colonization in band crevices
Silicone's porous surface and tight contact with skin can trap moisture and encourage…
Silicone watch band rarely contains PFAS-based treatment.
⚠Brand says nothing about PFAS
Citizen
AW1354-07H AW1354-07L & AW1354-15H Bracelet de Montre 59-S53137 Noir Silicone 24 mm Eco-Drive
silicone watch bracelet
Silicone degradation over time
Silicone can yellow, harden, or crack after years of UV exposure and skin contact. This…
Nickel or metal alloy contact (from buckle/clasp)
While the bracelet itself is silicone, the attachment hardware or any metal components…
Microplastic or particle shedding
Long-term wear and flexing can cause silicone to shed microscopic particles, particularly…
Silicone rarely contains PFAS without brand disclosure.
⚠Brand says nothing about PFAS
Graded and flagged Poor and Bad, we’d swap these
Citizen
CZ Smart Men's Smartwatch with Leather Strap
Stainless steel case, leather strap, unspecified waterproof coating
Formaldehyde / VOCs
Leather straps are typically chrome or vegetable-tanned, but finishing processes may use…
Coating degradation and particulate release
Waterproof coatings on smartwatches can flake or degrade under repeated stress (moisture…
Stainless steel nickel content
Stainless steel (typically 300-series) contains 8-12% nickel, which can leach in small…
Unspecified waterproof sealant or adhesive
Smartwatch cases use gaskets, adhesives, or press-fit seals whose composition Citizen…
Smartwatch waterproofing likely contains PFAS with limited transparency.
⚠Waterproof or stain-proof treatment
Better water-resistant smart rings & bands from other brands
Graded higher than the Citizen average of 79.
Amazfit
Helio Smart Ring Health Tracker
Titanium alloy case, polymer band
Polymer band composition and residual monomers
Limited concern
Bacterial growth in sealed band-case junction
Limited concern
No coating described, and no PFAS statement from the brand.
⚠Brand says nothing about PFAS
Oura
Ring 4 Size Smart Ring
Titanium, stainless steel core
Seal degradation and water ingress
Limited concern
Nickel leaching from stainless steel
Limited concern
Bacterial colonization in band crevices
Moderate concern
Skin allergen from metal sensitivity
Limited concern
No coating described, and no PFAS statement from the brand.
⚠Brand says nothing about PFAS
Oura
Ring 4 Ceramic Smart Ring with 8-Day Battery
Titanium and ceramic composite ring
Ceramic coating degradation
Limited concern
Nickel in titanium alloy
Limited concern
Ceramic and titanium pose lower PFAS risk; brand is silent.
⚠Brand says nothing about PFAS
See every Citizen product we grade on the Citizen brand page, or the full water-resistant smart rings & bands ranking.