Sedus · Office Chairs
Allwex KISO Suede Fabric Swivel Ergonomic Office Task Chair
Lower PFAS concern for suede upholstery alone; base material unknown, contact Sedus for specifics.
This ergonomic task chair uses suede fabric, which is a natural/synthetic material less likely to contain PFAS than nonstick, waterproof, or grease-resistant coatings. However, Sedus has not publicly disclosed PFAS content or testing, and the swivel base material is unspecified.
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Suede fabric upholstery, swivel base (material unspecified)
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 uses suede fabric upholstery, which is leather that has been buffed to create a soft nap. Suede itself is a natural material with lower inherent toxicity compared to synthetic upholsteries, though the tanning and finishing processes can introduce heavy metals (chromium, aluminum salts) and formaldehyde-based dyes or fixatives. The critical unknown is the swivel base material, typical office chair bases are either aluminum, steel, or plastic (often polypropylene or ABS). Sedus has not disclosed the base composition, which matters because plastic bases can off-gas volatile organic compounds (VOCs) or contain antimony stabilizers.
The brand's record and disclosure
Sedus is a German office furniture manufacturer with a reputation for mid-to-premium quality products. The company maintains minimal public transparency on chemical hazards and material sourcing; no independent certifications (Greenguard, Cradle to Cradle, OEKO-TEX) are on record for this specific chair model. The brand has not issued public statements addressing PFAS, formaldehyde, or heavy metals in their upholstery supply chains. This silence is typical for traditional furniture makers but limits third-party verification of tanning standards or dye safety.
How it compares in its category
Office task chairs with natural leather or suede upholstery generally carry lower chemical risk than those with polyurethane foam, vinyl, or synthetic fabrics treated with flame retardants or antimicrobial coatings. However, Sedus does not distinguish itself with certifications that would confirm low-VOC assembly or heavy-metal-tested materials. Competing brands such as Herman Miller or Steelcase publish more detailed environmental product declarations (EPDs), whereas this Allwex model appears to offer no equivalent documentation.
If you buy it
Before purchase, contact Sedus directly to confirm the swivel base material and any finish treatments applied to the suede. Upon delivery, allow the chair to air in a well-ventilated space for 24-48 hours to off-gas any residual solvents from manufacturing. Clean suede periodically with a soft brush or specialized suede eraser to prevent dust and mold accumulation. Do not expose the suede to prolonged moisture or direct heat, as this can degrade the material and increase leaching of tanning chemicals.
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.”
Heavy metals in leather tanning (chromium, aluminum)
Suede leather is typically tanned using chromium salts or aluminum-based salts. No test data is public for this specific Sedus chair, but suede tanning residues are a known source of dermal contact with trace metals. Skin contact risk is low during normal office use, but degradation or staining of the upholstery could increase leaching.
Formaldehyde-based dyes and finishes in suede
Suede is often dyed and finished with formaldehyde-releasing resins to improve color fastness and water resistance. No formaldehyde test results are published by Sedus for this model. Off-gassing risk is lower than for synthetic fabrics, but prolonged inhalation in poorly ventilated spaces (sealed offices) could accumulate trace formaldehyde exposure.
Volatile organic compounds (VOCs) from swivel base and assembly adhesives
The swivel base material is unspecified; if plastic (ABS or polypropylene), it may off-gas VOCs such as benzene or toluene, particularly in warm indoor environments. Office furniture adhesives and foam cushioning can also contribute to VOC loads. Sedus provides no off-gassing data or low-VOC certification for this chair.
Antimony stabilizers in plastic base components
If the swivel base uses plastic (common in office chairs), it may contain antimony trioxide as a heat and UV stabilizer. Antimony is classified as a possible human carcinogen and can migrate from plastic with age or heat exposure. No material specification sheet is publicly available for the Allwex KISO base.
Microbial and mold growth on untreated suede
Suede's porous, fibrous texture can trap moisture and dust, creating conditions for mold and bacterial colonization if not regularly cleaned or if stored in humid environments. This is a maintenance risk rather than a chemical hazard, but mold spores can trigger respiratory irritation or allergy in susceptible users.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 62% 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.