Waterproof Fitness Trackers, ranked by PFAS safety
15 products graded A to F, safest first. 3 earn a C or better and are worth buying.
Bad · Better · Best waterproof fitness trackers
The quickest read: what to skip and the top-graded picks worth buying instead.
Whoop
WHOOP Peak Health and Fitness Wearable 12-Month Membership
Wearable membership with minimal PFAS risk indicators.
Worth buying graded C or better, safest first
Withings
BeamO 3-in-1 Health MultiScan
Medical-grade stainless steel, plastic housing, medical sensors
Medical device with inherently low PFAS risk profile.
✓Naturally PFAS-free material
Whoop
Peak Health and Fitness Wearable 12-Month Membership
silicone band, electronics, stainless steel hardware
Wearable membership with minimal PFAS risk indicators.
⚠Brand says nothing about PFAS
Whoop
MG Navigator Band
Elastomer band (silicone-based or similar)
Lower concern fitness band, but brand silence on materials limits certainty.
⚠Brand says nothing about PFAS
Graded and flagged D and F, we’d swap these
Withings
ScanWatch 2
Stainless steel case, sapphire crystal, silicone/fluoroelastomer band
Smartwatch with waterproofing; PFAS risk unclear without material specs.
⚠Waterproof or stain-proof treatment
Withings
ScanWatch Light
Stainless steel case, elastomer strap, sapphire glass, water-resistant coating
Water-resistant smartwatch; PFAS coating risk unclear, no brand disclosure.
⚠Waterproof or stain-proof treatment
Withings
Scanwatch Nova Brilliant Smartwatch
stainless steel case, glass screen, polymer band with water resistance treatment
No PFAS disclosure; waterproofing treatment unknown and unverified.
⚠Waterproof or stain-proof treatment
Withings
ScanWatch Hybrid Smartwatch
Stainless steel case, sapphire crystal, synthetic band
Unknown waterproof coating; skip if PFAS concerned.
⚠Waterproof or stain-proof treatment
Withings
ScanWatch Hybrid 38mm Smartwatch with Additional Band
stainless steel case, elastomer/silicone band, waterproof coating
Smartwatch with likely water-repellent treatment; PFAS risk unclear, brand silent.
⚠Waterproof or stain-proof treatment
Withings
Steel HR Sport Smartwatch
Stainless steel case, unspecified water-resistant coating
Water-resistant coating composition undisclosed; PFAS risk unconfirmed.
⚠Waterproof or stain-proof treatment
Whoop
One 5.0 Health and Fitness Tracker
Silicone band, plastic/elastomer housing, unknown waterproof coatings
Waterproof wearable with undisclosed coatings; PFAS content unclear.
⚠Waterproof or stain-proof treatment
Whoop
Life MG Health and Fitness Tracker
Silicone band, electronics, waterproof coating
No public PFAS disclosure.
⚠Waterproof or stain-proof treatment
Whoop
4.0 Health & Activity Tracker
Silicone band, plastic case, waterproof treatment unspecified
Waterproof wearable, unspecified treatment composition raises concern.
⚠Waterproof or stain-proof treatment
Whoop
Peak 5.0, 12-Month Membership, Health and Fitness Wearable, 24/7 Activity and Sleep Tracker with Heart Rate
Silicone band with plastic/elastomer body, waterproofed
Wearable lacks material transparency; waterproofing source unclear.
⚠Waterproof or stain-proof treatment
Whoop
4.0 Life Smartwatch
silicone band, unknown waterproof coating on electronics
Skip until Whoop discloses waterproof treatment composition.
⚠Waterproof or stain-proof treatment
Whoop
Peak 5.0 Activity Tracker
Silicone band, electronic components, sealed polymer casing
Insufficient transparency.
⚠Waterproof or stain-proof treatment
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