Waterproof Smartwatches & Fitness Trackers, ranked by PFAS safety
54 products graded A to F, safest first. 6 earn a C or better and are worth buying.
Buyer’s guide
What to look for in waterproof smartwatches & fitness trackers, and which brands grade best and worst
Bad · Better · Best waterproof smartwatches & fitness trackers
The quickest read: what to skip and the top-graded picks worth buying instead.
Withings
Smartwatch Withings Steel HR Sport
Smartwatch likely lower concern; lacks PFAS transparency.
Swatch
Swatch Chrono 42 Quartz Watch
Lower concern. Standard watch materials pose minimal PFAS risk.
Worth buying graded C or better, safest first
Swatch
Chrono 42 Quartz Watch
Stainless steel case, mineral/plastic crystal, standard watch components
Lower concern. Standard watch materials pose minimal PFAS risk.
⚠Brand says nothing about PFAS
Swatch
SEA WASP
Plastic/resin watch case and strap
Typical consumer watch, no known PFAS risk signal identified
⚠Brand says nothing about PFAS
Swatch
Neon Seppia Big Bold Chrono Quartz Watch
Stainless steel case, plastic/resin band, mineral or acrylic crystal
Lower concern. Standard watch materials typically lack intentional PFAS use.
⚠Brand says nothing about PFAS
Swatch
Omega X Swatch Mission To Moon Quartz
Quartz crystal, stainless steel case, resin band
Lower concern. Quartz watch with standard materials, no PFAS-prone treatments typical.
⚠Brand says nothing about PFAS
Swatch
PACIFIC SEA NETTLE
Plastic watch case and resin strap
Standard plastic watch; no PFAS risk signals identified.
⚠Brand says nothing about PFAS
Swatch
MEDUSAE Quartz
Stainless steel case, plastic/resin components, mineral glass
Lower concern watch with standard materials, no PFAS-prone features.
⚠Brand says nothing about PFAS
Graded and flagged D and F, we’d swap these
Swatch
Scubaqua Sea Nettle Quartz Watch
Resin case, mineral glass, metal components, waterproof sealing
Waterproof watch likely uses PFAS-based sealants.
⚠Waterproof or stain-proof treatment
TomTom
Multi-Sport GPS Watch
plastic/elastomer case with waterproof coating
Sports watch with waterproof treatment; PFAS risk unclear without transparency.
⚠Waterproof or stain-proof treatment
TomTom
Runner GPS Watch
Plastic case, elastomer band, waterproof coating
GPS watch with waterproof treatment; brand silent on PFAS.
⚠Waterproof or stain-proof treatment
TomTom
Spark GPS Fitness Watch
Plastic case, elastomer band, waterproof coating
Unknown waterproof treatment; TomTom discloses nothing about PFAS.
⚠Waterproof or stain-proof treatment
TomTom
Spark Music GPS Fitness Watch
Plastic/elastomer case, unspecified water-resistant coating
Waterproof sports watch; material composition and coatings undisclosed.
⚠Waterproof or stain-proof treatment
TomTom
Golfer 2 GPS Watch
Plastic, rubber, glass; waterproof casing with unspecified coating
Limited data. Waterproof sports watches often use water-repellent coating treatments; TomTom silent on PFAS.
⚠Waterproof or stain-proof treatment
TomTom
Runner Cardio GPS Watch
Polymer case, elastomer band, waterproof coating
Unknown waterproofing chemistry; no brand disclosure on PFAS.
⚠Waterproof or stain-proof treatment
Withings
ScanWatch Light Hybrid Smart Watch
Stainless steel case, polymer straps, electronic components with waterproof coating
No public PFAS disclosure; water resistance coating unknown
⚠Waterproof or stain-proof treatment
Withings
Scanwatch HWA09 Hybrid Smartwatch
stainless steel, sapphire crystal, elastomer band
Waterproofing unknown; insufficient PFAS transparency for smartwatch.
⚠Waterproof or stain-proof treatment
Withings
ScanWatch Vitals
Stainless steel case, sapphire crystal, silicone/rubber strap with waterproof coating
No PFAS disclosure. Waterproof smartwatch with unknown treatment composition.
⚠Waterproof or stain-proof treatment
TomTom
Hot tomtom spark music and cardio gps Top Sale TomTom Spark Music Cardio Small Watch Purple Haze Sportique
Plastic casing with silicone band, waterproofed
Waterproof sports watch; water treatment likely uses PFAS.
⚠Waterproof or stain-proof treatment
Withings
ScanWatch 2 Hybrid Smartwatch
Stainless steel case, sapphire crystal, elastomer bands with water resistance
No PFAS disclosure available.
⚠Waterproof or stain-proof treatment
Fitbit
Google Fitbit Air Screenless Health & Fitness Tracker
Plastic housing, elastomer band, waterproof coating unknown
Waterproof wearable, no PFAS disclosure.
⚠Waterproof or stain-proof treatment
Fitbit
Inspire 3 Fitness Tracker Health
Plastic band, elastomer strap, waterproof-treated electronics housing
Wearable with likely water-resistant treatments; PFAS status unclear.
⚠Waterproof or stain-proof treatment
Fitbit
Versa 4 Fitness Smartwatch
Aluminum case, resin band, unspecified water-resistant coating
Smartwatch with waterproofing; PFAS content in coatings undisclosed.
⚠Waterproof or stain-proof treatment
Fitbit
Versa 4 Smart Sports Watch
Aluminum case, elastomer band, unspecified water-resistant coating
Unclear water-resistant coating source.
⚠Waterproof or stain-proof treatment
Fitbit
Charge 6 Fitness Tracker
Elastomer band, stainless steel case, unspecified water-resistant coating
Skip; waterproof tech likely contains PFAS, no disclosure available.
⚠Waterproof or stain-proof treatment
Fitbit
Sense Smartwatch
Aluminum, stainless steel, rubber, unspecified coatings
Unknown waterproof coating composition; no PFAS disclosure from brand.
⚠Waterproof or stain-proof treatment
Fitbit
Charge 6 Health & Fitness Tracker
Plastic band, metal buckle, unspecified waterproof coating
No PFAS disclosure. Waterproof coating composition unconfirmed.
⚠Waterproof or stain-proof treatment
Samsung
Galaxy Watch7 BT Smartwatch with Energy Monitor
aluminum case, stainless steel back, sapphire crystal, polymer/coating on band
Limited public PFAS data; waterproof smartwatch likely uses water-repellent coating coatings.
⚠Waterproof or stain-proof treatment
Samsung
Galaxy Watch Ultra2
Stainless steel case, sapphire crystal, elastomer band with water-resistant coating
No public PFAS disclosure; water-resistance coating composition unspecified.
⚠Waterproof or stain-proof treatment
Samsung
Galaxy Watch9
Stainless steel case, glass display, polymer straps, waterproof sealing compounds
Limited PFAS data available; typical smartwatch construction suggests lower concern
⚠Waterproof or stain-proof treatment
Realme
Watch 5 Smartwatch
Plastic case, glass screen, unknown water-resistant treatment
Smartwatch with unspecified water resistance; PFAS risk unclear.
⚠Waterproof or stain-proof treatment
Realme
Watch 5 Titanium Smartwatch
Titanium case, unspecified waterproof coating/sealant
Skip until coating composition disclosed; waterproof smartwatches often use PFAS.
⚠Waterproof or stain-proof treatment
Realme
6 Fitness Tracker
Silicone band, plastic/polymer components, waterproof coating
Fitness tracker with waterproof coating; PFAS details undisclosed by Realme.
⚠Waterproof or stain-proof treatment
Realme
Techlife Watch R100 Smartwatch
Stainless steel case, unspecified waterproof coating
Unknown waterproof treatment raises concern.
⚠Waterproof or stain-proof treatment
Realme
Watch 3 Pro RMW2107
Stainless steel case, unknown waterproof coating/treatment
Smartwatch with undisclosed waterproofing; limited PFAS transparency available.
⚠Waterproof or stain-proof treatment
Realme
6 Men's Smart Watch with Voice Command
Stainless steel case, elastomer band, likely waterproof coating
Skip. Waterproof smartwatch likely uses fluorinated water-repellent coating; no PFAS disclosure.
⚠Waterproof or stain-proof treatment
Realme
Gps Realme Watch Pro Kaufen Oraimo Watch 5R Pro AMOLED Wireless Calling IP68
Plastic case, glass AMOLED screen, unspecified water-resistant coating
Skip until brand discloses waterproof treatment chemistry.
⚠Waterproof or stain-proof treatment
Realme
Watch S Smartwatch with Blood Oxygen Level Sensor
Stainless steel case, silicone band, glass display with waterproof treatment
Smartwatch water resistance likely treated; Realme silent on PFAS details.
⚠Waterproof or stain-proof treatment
Xiaomi
Smart Band 9 Active Smartwatch
Plastic band, metal casing, waterproof coating unspecified
Unknown waterproof coating.
⚠Waterproof or stain-proof treatment
Xiaomi
Watch S5 Smartwatch
Stainless steel case, plastic composite band, waterproof coating (unspecified type)
Insufficient transparency; waterproofing type and coatings unspecified.
⚠Waterproof or stain-proof treatment
Xiaomi
Redmi Watch 5 Active Midnight Silver - 18-Day Battery Life, 2-Inch Display, 140+ Workout Modes, 5atm Waterproof, Bluetoo
Unspecified watch body and coatings, 5ATM waterproof treatment
Smartwatch with unspecified waterproof treatment; PFAS risk unclear.
⚠Waterproof or stain-proof treatment
Xiaomi
Smart Band 9
Silicone band with stainless steel case, waterproof coating
Waterproof wearables may use PFAS; Xiaomi silent on specifics.
⚠Waterproof or stain-proof treatment
Xiaomi
Redmi Watch 6 Smartwatch
Stainless steel case, glass/polymer display with waterproof coating
Smartwatch waterproofing likely uses PFAS; no disclosure from Xiaomi.
⚠Waterproof or stain-proof treatment
Xiaomi
Redmi Watch 5 Lite Smartwatch - 1.96 inch Amoled, 18-Day Battery, 5atm Waterproof, Alexa, Bluetooth Calling, Black, Adul
Stainless steel case, AMOLED display, elastomer strap, water-resistant coating
Consumer electronics with water resistance, PFAS risks unconfirmed but unverified.
⚠Waterproof or stain-proof treatment
Xiaomi
Smartwatch Ip68 Waterproof Bluetooth Call Electrocardiogram Bp
Unspecified polymers, electronics, waterproof coating
Unknown waterproof coating composition raises concern.
⚠Waterproof or stain-proof treatment
Xiaomi
Smart Band 9 Pro Smartwatch
Aluminum alloy case, elastomer strap, unspecified waterproof coating
Skip until Xiaomi discloses waterproof treatment chemistry.
⚠Waterproof or stain-proof treatment
Samsung
Galaxy Watch Ultra (2025) Titanium LTE 64 GB Display
Titanium case, AMOLED display, unspecified water-resistant coatings
No public PFAS disclosure; waterproof coating likely used but unspecified.
⚠Waterproof or stain-proof treatment
Swatch
Scubaqua Aurelia Aurita Skeleton Quartz Watch
stainless steel case, synthetic rubber strap, mineral glass with water-resistant seal
Waterproof watch, likely PFAS in seals; no disclosure from Swatch.
⚠Waterproof or stain-proof treatment
Amazfit
Helio Strap Fitness Tracker
Rubber/silicone strap, elastomer band with waterproof coating
Insufficient disclosure. Waterproof coating likely, composition unknown.
⚠Waterproof or stain-proof treatment
Amazfit
Balance 2 XT Smartwatch
Stainless steel case, glass face, plastic/elastomer band, waterproof coating
Smartwatch with unspecified waterproof treatment; PFAS risk unclear.
⚠Waterproof or stain-proof treatment
Amazfit
Bip 6 Smartwatch
Plastic case, glass/AMOLED display, metal frame, elastomer band, unspecified waterproof coatings
Waterproofing likely uses water-repellent coating; Amazfit discloses nothing about PFAS.
⚠Waterproof or stain-proof treatment
TomTom
Multi-Sport Cardio GPS Watch
Polymer case, elastomer band, waterproof coating
Water-resistant sports watches often use water-repellent coating coatings; TomTom discloses nothing about PFAS.
⚠Waterproof or stain-proof treatment
Withings
Smartwatch 0850630 Smartwatch Withings INW510 Scanwatch + Body White
Stainless steel case, elastomer/polymer band, waterproof coatings
Waterproof smartwatch; water-resistant coatings may contain PFAS, brand silent.
⚠Waterproof or stain-proof treatment
Withings
Smartwatch Withings Scanwatch Wristband Withings ScanWatch 38mm Black
Rubber/elastomer wristband, likely water-resistant treated
Unknown waterproof treatment method; insufficient disclosure to assess PFAS risk.
⚠Waterproof or stain-proof treatment
Withings
Pulse O2 Activity Tracker
Plastic casing, elastomer band, waterproof coating (type unspecified)
Waterproof activity tracker; coating type undisclosed, PFAS risk unclear.
⚠Waterproof or stain-proof treatment
Withings
Smartwatch Withings Steel HR Sport
Stainless steel case, possibly water-resistant polymer gaskets and coatings
Smartwatch likely lower concern; lacks PFAS transparency.
⚠Waterproof or stain-proof treatment
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