Stainless Steel Waterproof Smart Rings & Bands, ranked by PFAS safety
All 16 bare stainless steel picks in our waterproof smart rings & bands database, graded A to F and ranked safest first. 6 earn a buy-worthy grade.
Fitbit
Oura - Ring 5 - Smart Ring - Size Before You Buy with OR5 Sizing Kit - Size 11 - Silver - (2026)
Titanium and stainless steel with glass sensor
Lower concern smart ring; no PFAS-prone materials identified.
⚠Brand says nothing about PFAS
Polar
Smart Ring for Women
Stainless steel casing, silicone band
Lower PFAS concern. Smart rings typically avoid deliberate Teflon-family coating.
⚠Brand says nothing about PFAS
Polar
QRNT Original Smart Ring
Stainless steel, sapphire crystal glass, ceramic
Smart ring with inherently lower-risk materials, no PFAS disclosure available.
⚠Brand says nothing about PFAS
Polar
RingConn Gen 3
Stainless steel, glass, ceramic sensors
Smart ring with inherently low PFAS risk profile.
⚠Brand says nothing about PFAS
Ultrahuman
Oura Ring 5 Smart Ring
Titanium, stainless steel, sapphire crystal
Lower concern. No known PFAS-prone coatings identified.
⚠Brand says nothing about PFAS
Samsung
Galaxy Black Smart Ring
Titanium/stainless steel with unknown internal electronics coating
No public PFAS disclosure; smart ring materials mostly unclear.
⚠Brand says nothing about PFAS
Samsung
Galaxy Ring – Multiple Sizes - Multiple Colors (2024) Fair
Titanium, stainless steel, sapphire crystal, unknown coatings
No public PFAS data available.
⚠Undisclosed proprietary coating
Fitbit
Oura Smart Ring 4
Titanium, stainless steel, sapphire crystal, silicone band with waterproof treatment
Waterproof smart ring; PFAS risk unclear without material disclosure.
⚠Waterproof or stain-proof treatment
Fitbit
Oura Ring 5 Smart Ring
Titanium, stainless steel, sapphire crystal with unspecified waterproof coating
Smart ring with waterproof coating; PFAS composition not publicly disclosed.
⚠Waterproof or stain-proof treatment
Fitbit
Charge 6 Activity Tracker Smart Ring Size 9 Silver Black
Stainless steel, elastomer, unknown waterproof coating
Wearable with waterproofing; coating details undisclosed.
⚠Waterproof or stain-proof treatment
Fitbit
Smart Ring Health Tracker
Stainless steel band, polymer sensors, waterproof coating unspecified
Unspecified waterproof coating raises PFAS concern.
⚠Waterproof or stain-proof treatment
Withings
PulseRive Blood Pressure Monitoring Smart Rings. - Electronics
Stainless steel ring with waterproof/water-resistant electronics coating
Smart ring waterproofing unexplained; PFAS risk unclear without material disclosure.
⚠Waterproof or stain-proof treatment
Circular
Oura Ring 5 Smart Ring
Titanium, stainless steel, anodized coating
Waterproof ring with opaque coating.
⚠Waterproof or stain-proof treatment
Circular
Oura Smart Ring 4
Titanium, stainless steel, polymers with water-resistant coating
Wearable with unspecified water-resistant coating; PFAS status unclear.
⚠Waterproof or stain-proof treatment
Samsung
Galaxy Ring No Smart Ring activity tracker IP68 Gold
Titanium, glass, ceramic, stainless steel with unspecified waterproof coating
IP68 waterproofing raises PFAS concern; Samsung discloses no coating details.
⚠Waterproof or stain-proof treatment
Polar
Unisex Health Tracker Smart Ring
Stainless steel body with unspecified waterproof coating
Minimal public transparency on materials and coatings.
⚠Waterproof or stain-proof treatment
See every material: all waterproof smart rings & bands grades →