ErgoChair Pro+ Green Mesh vs West Elm Humanscale World LM Task Chair: which is safer?
These two grade almost identically. Pick on price and preference; neither has a PFAS edge.
Autonomous
ErgoChair Pro+ Green Mesh
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleVolatile Organic Compound (VOC) off-gassing
PossiblePolyester microfiber shedding
PossibleSteel frame corrosion and rust contact
Humanscale
West Elm Humanscale World LM Task Chair
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleFormaldehyde in fabric finishes and dyes
PossibleAzo dyes and other dye-related allergens
PossibleFabric antimicrobial or water-repellent treatment (undisclosed)
Where these two actually differ
- We flag Volatile Organic Compound (VOC) off-gassing, Polyester microfiber shedding and Steel frame corrosion and rust contact on the Autonomous and not on the Humanscale.
- We flag Formaldehyde in fabric finishes and dyes, Azo dyes and other dye-related allergens and Fabric antimicrobial or water-repellent treatment (undisclosed) on the Humanscale and not on the Autonomous.
- The Autonomous is mesh fabric (polyester), steel frame where the Humanscale is aluminum frame, foam cushioning, mesh/upholstery fabric, which is most of the difference in these two grades.
- These two are level, close enough that price and fit should decide it rather than our grade.
Both products run through the same public rubric, which covers materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →
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