Humanscale · Office Chairs
Humanscale World LM Beige Seat Task Office Chair | Crate & Barrel
Lower PFAS concern for typical office chair, but no transparency on fabric treatments or foam composition.
The Humanscale World LM is a standard upholstered office chair with no public PFAS claims or third-party certifications. Office chair textiles and foam cushioning can contain PFAS-based treatments (water/stain repellents, flame retardants), but Humanscale provides no material disclosure to confirm or rule this out.
Shop Humanscale on Amazon →Material
Beige upholstered task chair; likely polyester fabric on foam cushion with steel frame
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.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
This chair combines a steel frame with polyester upholstery over foam cushioning, a standard office chair construction. Polyester fabric itself is chemically stable in normal use, but the concern centers on what treatments were applied during manufacturing: dyes, finishing resins, and flame retardant coatings. The foam cushion is where volatile off-gassing risk is highest if it contains flame retardants or formaldehyde-based binders, though modern office furniture typically uses lower-emission foams.
The brand's record and disclosure
Humanscale is known for environmental and ergonomic focus, holding B Corp certification and publishing sustainability reports that address manufacturing practices. However, detailed material safety data sheets for specific upholstery treatments and foam chemistry are not readily available in public domain. The brand does not loudly advertise PFAS-free status or third-party testing for flame retardants on this product line, leaving some opacity on chemical inputs.
How it compares in its category
This Humanscale chair sits in the mid-to-premium segment where chemical oversight is generally better than budget office chairs but less transparent than high-end certified alternatives like Herman Miller Aeron or Steelcase chairs with published Cradle-to-Cradle or Greenguard certifications. Beige upholstery in natural shades sometimes uses fewer azo dyes than darker colors, which is a minor advantage. Most office chairs in this price range have similar foam and fabric risk profiles.
If you buy it
Allow 24-72 hours of airing in a well-ventilated space before heavy use to reduce any initial off-gassing. Avoid placing the chair in direct sunlight or near heat sources above 70C (160F), which accelerates foam degradation and potential off-gassing. Vacuum or wipe the upholstery monthly to prevent dust and microfiber accumulation. Replace the chair if seams tear, foam compresses permanently, or visible degradation appears, as worn cushioning may release particles.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Foam off-gassing (VOC and possible formaldehyde releasers)
Polyurethane foam in office chairs may contain formaldehyde-based binders or isocyanate residues; Humanscale does not publish foam specification sheets publicly. Off-gassing is typically minor in new chairs over weeks but varies by foam type and storage conditions before purchase.
Azo dyes and finishing resins in polyester upholstery
Beige polyester fabrics use fewer azo dyes than dark colors, reducing risk of aromatic amine leaching, but no independent testing of this specific fabric batch is available. Risk is low in normal seated use; concern rises only if fabric is wetted repeatedly or if upholstery comes into prolonged contact with skin in hot, sweaty conditions.
Flame retardants (halogenated or phosphorus-based)
Office chairs often include flame retardant treatments on foam or fabric to meet California TB117 or similar standards. Humanscale has not publicly committed to halogen-free flame retardants for this model, and no third-party test results are available.
Microplastics from upholstery degradation
Polyester fabric will shed fine fibers over years of wear, particularly if seams fray or fabric thins. This is a minor chronic exposure in an office setting with limited direct skin contact; risk is higher for chairs in heavily used shared spaces or with poor maintenance.
Steel frame corrosion or coating degradation
Humanscale uses powder-coated or painted steel frames that are stable in typical office environments. Corrosion risk is minimal unless the chair is exposed to moisture or salt spray; no specific recalls or coating failures are on record for this model.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 65% 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.
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.