Basis Review, Is Basis Non-Toxic?
Across 2 graded products, Basis averages Excellent (85/100). On disclosure, the brand says nothing publicly about PFAS. 2 of its products grade Good or better. Grades are model-based estimates, not lab results.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Worth buying from Basis Good or better, best-graded first
Basis
"world's Most Advanced Health Tracker" 2014 Edition, Carbon
Electronics, plastic, stainless steel components
Lithium-polymer battery degradation and leakage
A 2014 device is now 10+ years old. Lithium cells degrade, swell, and may leak…
Plasticizer and residual monomer off-gassing from elastomer band
Early silicone and elastomer compounds used in wearables sometimes contained trace…
Stainless steel nickel leaching (skin contact)
Stainless steel watch components (buckles, casing trim) typically contain 8-12% nickel.…
Microplastics
After a decade, engineering plastics become brittle and may fragment under wear or flex…
Wearable electronics; no public PFAS information available.
⚠Brand says nothing about PFAS
Basis
Health Fitness Tracker Monitor Sensor Digital Watch
Stainless steel case, silicone band
Silicone band aging and oligomer leaching
Silicone elastomers naturally release low-molecular-weight cyclic siloxanes (D4, D5) over…
Stainless steel nickel content and dermal sensitivity
Most stainless steel contains 8-12% nickel, which can trigger allergic contact dermatitis…
Bacterial or fungal growth under band
The sealed interface between silicone band and case creates a moist microenvironment that…
No coating described, and no PFAS statement from the brand.
⚠Brand says nothing about PFAS
Basis and PFAS, common questions
- Does Basis have PFAS?
- We graded 2 Basis products, averaging Excellent (85/100). 2 grade Good or better. Grades are model-based estimates built from published materials, ingredients and disclosures, not lab tests.
- Is Basis non-toxic?
- Basis "world's Most Advanced Health Tracker" 2014 Edition, Carbon is the highest-graded Basis product we have scored, at 85/100. It depends on the product line rather than the brand, so check the grade of the exact item you are buying.
- Which Basis products are lower concern for PFAS?
- The highest-graded Basis products we have scored are Basis "world's Most Advanced Health Tracker" 2014 Edition, Carbon, Basis Health Fitness Tracker Monitor Sensor Digital Watch. That is our model-based estimate from materials and public disclosure, not a lab test.
Every grade uses the same public rubric. How grades work →