The Best Stainless Steel Waterproof Fitness Trackers & Cases of 2026
All 45 options with stainless steel in their construction in our waterproof fitness trackers & cases database, graded Bad to Excellent and ranked lowest risk first. 42 earn a buy-worthy grade.
Why X-Doria Classic Plus Stainless Steel Magnetic wins, and what it beats
Every grade on this page is one sum. A category starts from a baseline, each disclosed material or coating adds risk points, and each thing the brand or a third party has published takes them away. Below is that sum for the winner, then for 1 product it beats, so you can see exactly where the 45 points between the top and the bottom of this stainless steel waterproof fitness trackers & cases ranking come from.
The winner
Made of Stainless steel, magnetic closure.
- +15No PFAS disclosure. No public statement from the brand about PFAS in this product.
- +10Category baseline. The starting point for this type of product, before anything specific to this product is counted.
- -10Base material not linked to PFAS. The main material recorded for this product is not one associated with PFAS.
15risk points in total, which is a grade of 85
What the grade does not fix. It still carries one risk factor, No PFAS disclosure. See the full breakdown.
What it beats, and why
What puts it behind. Waterproof / stain-resistant treatment, +35 points. Water-repellent coating treatments have historically used PFAS. The winner carries no such factor.
Made of Stainless steel case, cork accents, unspecified touchscreen coating and water-resistant treatment.
- +35Waterproof / stain-resistant treatment
- +15No PFAS disclosure
- +10Category baseline
60risk points, a grade of 40
No product on this page was physically tested by us. Every number above comes from published materials, ingredient and coating disclosures, certifications and brand statements, scored on one public rubric. Formulations change without notice, so check the current product listing before buying.
All 30 stainless steel waterproof fitness trackers & cases, best graded first
- Stainless steel, magnetic closure
- We found no PFAS statement from the brand
- Nickel leaching from stainless steel
- Stainless steel band, magnetic closure
- We found no PFAS statement from the brand
- Nickel leaching from stainless steel
3 hazards checked on this product, all on its full breakdown.
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- Silicone and stainless steel band
- Nickel release from stainless steel hardware
4 hazards checked on this product, all on its full breakdown.
Fitbit
Supcase Rugged Buckle Case for Fitbit Ionic,Strap Replacement Bands for Fitbit Ionic Smartwatch
- Silicone, elastomer, stainless steel bands
- Bacterial and mold growth
2 hazards checked on this product, all on its full breakdown.
- Stainless steel case, plastic/silicone band, electronic components
- We found no PFAS statement from the brand
- Silicone band degradation and skin irritation
2 hazards checked on this product, all on its full breakdown.
- Stainless steel case, silicone band
- We found no PFAS statement from the brand
- Silicone band aging and oligomer leaching
3 hazards checked on this product, all on its full breakdown.
- Plastic/elastomer band, stainless steel, glass display
- Elastomer band degradation and sweat interaction
2 hazards checked on this product, all on its full breakdown.
- Plastic/elastomer case, glass face, stainless steel band
- We found no PFAS statement from the brand
- Nickel leaching (stainless steel band)
2 hazards checked on this product, all on its full breakdown.
- Stainless steel case, elastomer band
- Elastomer band degradation and skin irritation
3 hazards checked on this product, all on its full breakdown.
- Stainless steel case, resin band
- We found no PFAS statement from the brand
- Resin band degradation and sweat accumulation
2 hazards checked on this product, all on its full breakdown.
- Stainless steel case, composite band, waterproof elastomer seals
- We found no PFAS statement from the brand
- Elastomer/silicone band degradation and bacterial colonization
2 hazards checked on this product, all on its full breakdown.
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- Stainless steel case, elastomer band
- We found no PFAS statement from the brand
- Elastomer band degradation and particulate shedding
3 hazards checked on this product, all on its full breakdown.
- Stainless steel case, elastomer band, glass display with waterproof sealing
- We found no PFAS statement from the brand
- Elastomer band degradation and oligomer release
4 hazards checked on this product, all on its full breakdown.
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- Elastomer band, stainless steel case
- Elastomer contact dermatitis
3 hazards checked on this product, all on its full breakdown.
- Stainless steel case, elastomer band
- We found no PFAS statement from the brand
- Elastomer band degradation and skin contact
3 hazards checked on this product, all on its full breakdown.
- Stainless steel case, elastomer strap
- We found no PFAS statement from the brand
- Elastomer strap degradation and skin contact
3 hazards checked on this product, all on its full breakdown.
- Stainless steel case, sapphire crystal, elastomer strap
- We found no PFAS statement from the brand
- Elastomer strap degradation
2 hazards checked on this product, all on its full breakdown.
- Silicone band, AMOLED display, aluminum frame, stainless steel caseback
- We found no PFAS statement from the brand
- Heavy metals
3 hazards checked on this product, all on its full breakdown.
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- Silicone band, stainless steel case, AMOLED display
- We found no PFAS statement from the brand
- Nickel leaching from stainless steel case
2 hazards checked on this product, all on its full breakdown.
- Stainless steel case, glass screen, elastomer/silicone band
- Nickel in stainless steel (skin contact allergen)
2 hazards checked on this product, all on its full breakdown.
- Stainless steel case, polymer/elastomer band
- We found no PFAS statement from the brand
- Elastomer band degradation and microparticle shedding
3 hazards checked on this product, all on its full breakdown.
- Glass/stainless steel case, elastomer strap
- We found no PFAS statement from the brand
- Elastomer strap degradation and bacterial growth
3 hazards checked on this product, all on its full breakdown.
- Stainless steel case, plastic band
- We found no PFAS statement from the brand
- Plastic band material identity and additives
3 hazards checked on this product, all on its full breakdown.
- Electronics, plastic, stainless steel components
- We found no PFAS statement from the brand
- Lithium-polymer battery degradation and leakage
4 hazards checked on this product, all on its full breakdown.
- Stainless steel case, elastomer band
- We found no PFAS statement from the brand
- Elastomer band degradation and microbial colonization
2 hazards checked on this product, all on its full breakdown.
- Stainless steel case, polymer band
- We found no PFAS statement from the brand
- Nickel leaching from stainless steel case
2 hazards checked on this product, all on its full breakdown.
- Stainless steel case
- We found no PFAS statement from the brand
- Nickel dermal sensitization from stainless steel contact
4 hazards checked on this product, all on its full breakdown.
- Stainless steel case, plastic band, glass screen
- We found no PFAS statement from the brand
- Microplastics
2 hazards checked on this product, all on its full breakdown.
- Silicone band, stainless steel hardware, waterproofed substrate
- We found no PFAS statement from the brand
- Stainless steel nickel leaching or allergy risk
2 hazards checked on this product, all on its full breakdown.
- Stainless steel case, elastomer band, water-resistant polymer lens
- We found no PFAS statement from the brand
- Elastomer off-gassing and volatile organics
3 hazards checked on this product, all on its full breakdown.
Every material, ranked together, is in the full waterproof fitness trackers & cases ranking →