PFAS score
Seventh Tree · Office Chairs
Series 7 Office Chair 3117
Skip until fabric & foam composition are disclosed.
Seventh Tree does not publicly disclose materials or PFAS status for the Series 7 3117. Office chair foams and synthetic fabrics can contain PFAS treatments, but without product specs or brand transparency, risk cannot be reliably assessed. Request detailed material safety data before purchase.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Unknown; typical office chair fabrics/foam/frame not specified
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
furniture is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 25% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Office Chairs
Herman Miller
Embody Chair Herman Miller
Fabric (polyester/nylon blend) and aluminum/steel frame; no Teflon-family coating or water-resistant coating disclosed
Lower concern, office chair with no known PFAS-risk treatments, but Herman Miller discloses nothing about PFAS practices.
⚠Risky category by default
Herman Miller
Verus Task Chair
cast aluminum frame, upholstered fabric seat/back, polyester mesh
Lower PFAS concern for frame; upholstery fabric source unclear, request material transparency if concerned.
⚠Risky category by default
Herman Miller
Sayl Chair
nylon and polypropylene plastics, aluminum frame
Lower PFAS concern; typical office chair with no obvious fluorochemical triggers.
⚠Risky category by default
More office chairs grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.