The Best Stainless Steel Waterproof Smartphone Cases of 2026

All 25 options with stainless steel in their construction in our waterproof smartphone cases database, graded Bad to Excellent and ranked lowest risk first. 25 earn a buy-worthy grade.

All 25 stainless steel waterproof smartphone cases, best graded first

Omega X Swatch Mission To Moon Quartz

Swatch

Omega X Swatch Mission To Moon Quartz

85ExcellentPFAS grade
  • Quartz crystal, stainless steel case, resin band
  • We found no PFAS statement from the brand
  • Resin band VOC off-gassing

3 hazards checked on this product, all on its full breakdown.

Swatch Chrono 42 Quartz Watch

Swatch

Chrono 42 Quartz Watch

85ExcellentPFAS grade
  • Stainless steel case, mineral/plastic crystal, standard watch components
  • We found no PFAS statement from the brand
  • Mineral crystal breakage and laceration

2 hazards checked on this product, all on its full breakdown.

Swatch MEDUSAE Quartz

Swatch

MEDUSAE Quartz

85ExcellentPFAS grade
  • Stainless steel case, plastic/resin components, mineral glass
  • We found no PFAS statement from the brand
  • Plastic/resin component degradation

3 hazards checked on this product, all on its full breakdown.

Swatch Neon Seppia Big Bold Chrono Quartz Watch

Swatch

Neon Seppia Big Bold Chrono Quartz Watch

85ExcellentPFAS grade
  • Stainless steel case, plastic/resin band, mineral or acrylic crystal
  • We found no PFAS statement from the brand
  • Plastic band degradation and fragmentation

2 hazards checked on this product, all on its full breakdown.

Realme Watch 3 Pro RMW2107

Realme

Watch 3 Pro RMW2107

85ExcellentPFAS grade
  • Stainless steel case
  • We found no PFAS statement from the brand
  • Nickel leaching from stainless steel
  • Stainless steel case, silicone band, glass display
  • We found no PFAS statement from the brand
  • Silicone band degradation and microbial growth

3 hazards checked on this product, all on its full breakdown.

Samsung Galaxy Watch Ultra2

Samsung

Galaxy Watch Ultra2

85ExcellentPFAS grade
  • Stainless steel case, sapphire crystal, elastomer band
  • Elastomer band bacterial growth and odor

3 hazards checked on this product, all on its full breakdown.

  • Aluminum case, stainless steel back, sapphire crystal, polymer/ on band
  • Polymer band degradation

3 hazards checked on this product, all on its full breakdown.

Samsung Galaxy Watch9

Samsung

Galaxy Watch9

85ExcellentPFAS grade
  • Stainless steel case, glass display, polymer straps, waterproof sealing compounds
  • Polymer strap degradation and allergen release

4 hazards checked on this product, all on its full breakdown.

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  • stainless steel case, synthetic rubber strap, mineral glass with water-resistant seal
  • We found no PFAS statement from the brand
  • PFAS

4 hazards checked on this product, all on its full breakdown.

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Smartwatch Withings Steel HR Sport

Withings

Smartwatch Withings Steel HR Sport

85ExcellentPFAS grade
  • Stainless steel case, possibly water-resistant polymer gaskets
  • We found no PFAS statement from the brand
  • BPA & bisphenols

4 hazards checked on this product, all on its full breakdown.

Withings Scanwatch HWA09 Hybrid Smartwatch

Withings

Scanwatch HWA09 Hybrid Smartwatch

85ExcellentPFAS grade
  • stainless steel, sapphire crystal, elastomer band
  • We found no PFAS statement from the brand
  • Elastomer band degradation and additive leaching

4 hazards checked on this product, all on its full breakdown.

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  • Stainless steel case, AMOLED display, elastomer strap
  • We found no PFAS statement from the brand
  • Elastomer strap degradation and skin irritation

3 hazards checked on this product, all on its full breakdown.

Xiaomi Smart Band 9

Xiaomi

Smart Band 9

85ExcellentPFAS grade
  • Silicone band with stainless steel case
  • We found no PFAS statement from the brand
  • Nickel leaching from stainless steel case

3 hazards checked on this product, all on its full breakdown.

Amazfit Balance 2 XT Smartwatch

Amazfit

Balance 2 XT Smartwatch

85ExcellentPFAS grade
  • Stainless steel case, glass face, plastic/elastomer band
  • We found no PFAS statement from the brand
  • Elastomer band degradation and microbial colonization
Fitbit Charge 6 Fitness Tracker

Fitbit

Charge 6 Fitness Tracker

85ExcellentPFAS grade
  • Elastomer band, stainless steel case
  • Bacterial growth / skin irritation from band material

3 hazards checked on this product, all on its full breakdown.

Fitbit Sense Smartwatch

Fitbit

Sense Smartwatch

85ExcellentPFAS grade
  • Aluminum, stainless steel, rubber
  • Rubber band skin contact and additives

4 hazards checked on this product, all on its full breakdown.

Realme 6 Men's Smart Watch with Voice Command

Realme

6 Men's Smart Watch with Voice Command

85ExcellentPFAS grade
  • Stainless steel case, elastomer band
  • We found no PFAS statement from the brand
  • Elastomer band degradation and microparticle shedding

2 hazards checked on this product, all on its full breakdown.

realme Techlife Watch R100 Smartwatch

Realme

Techlife Watch R100 Smartwatch

85ExcellentPFAS grade
  • Stainless steel case
  • We found no PFAS statement from the brand
  • Nickel leaching from stainless steel

4 hazards checked on this product, all on its full breakdown.

Withings ScanWatch 2 Hybrid Smartwatch

Withings

ScanWatch 2 Hybrid Smartwatch

85ExcellentPFAS grade
  • Stainless steel case, sapphire crystal, elastomer bands with water resistance
  • We found no PFAS statement from the brand
  • water-repellent coating (water-repellent coating) treatment chemistry

3 hazards checked on this product, all on its full breakdown.

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Withings ScanWatch Light Hybrid Smart Watch

Withings

ScanWatch Light Hybrid Smart Watch

85ExcellentPFAS grade
  • Stainless steel case, polymer straps, electronic components
  • We found no PFAS statement from the brand
  • Polymer strap degradation and skin contact

2 hazards checked on this product, all on its full breakdown.

Withings ScanWatch Vitals

Withings

ScanWatch Vitals

85ExcellentPFAS grade
  • Stainless steel case, sapphire crystal, silicone/rubber strap
  • We found no PFAS statement from the brand
  • Nickel release from stainless steel case (contact dermatitis)

3 hazards checked on this product, all on its full breakdown.

  • Stainless steel case, elastomer/polymer band
  • We found no PFAS statement from the brand
  • Allergens in band material or finishes
Xiaomi Redmi Watch 6 Smartwatch

Xiaomi

Redmi Watch 6 Smartwatch

85ExcellentPFAS grade
  • Stainless steel case, glass/polymer display
  • We found no PFAS statement from the brand
  • Nickel leaching from stainless steel

2 hazards checked on this product, all on its full breakdown.

Xiaomi Watch S5 Smartwatch

Xiaomi

Watch S5 Smartwatch

85ExcellentPFAS grade
  • Stainless steel case, plastic composite band
  • We found no PFAS statement from the brand
  • Plastic band degradation and skin contact

2 hazards checked on this product, all on its full breakdown.

Every material, ranked together, is in the full waterproof smartphone cases ranking →