Reviewed for sustainabilityComosum Meter · Case 3.0 / 5Show the six category scores

Tanso Chair Cushion is made by Case. We review every brand we carry against published evidence in six categories; Case scores 3.0 out of 5 (18 of 30).

  • Material 3 out of 5Solid oak, walnut, teak; no certificate
  • Transportation 3 out of 5Mostly made in Asia; tables in Lithuania
  • Manufacturing 3 out of 5Country of make stated for every product
  • Labor 2 out of 5No supplier code of conduct published
  • Energy 3 out of 5No factory energy data published
  • Durability 4 out of 5Contract-rated; Cross table since 2006
Brand-level score · Rubric v2.2 · Reviewed September 2026How we score

Tanso Chair Cushion

Est. 2005 · London

Sale price$98.00

Shipping: $10 flat · FREE on orders $1,500+

✓ 30-Day Returns · ✓ Warranty Included · Questions? Chat with a design specialist →

Size: 20.5" x 15.4" (520 x 390 mm)

Size

✓ In Stock — Ships in 1–2 weeks

The maker · Est. 2005 · London, UK

Case

London-designed furniture by Royal Designers for Industry

Paul Newman founded Case in 2005. Matthew Hilton and Terence Woodgate, both Royal Designers for Industry, have designed for it since the first collection, and it reissues Robin Day's 1964 Forum sofa with the Robin and Lucienne Day Foundation.

  • Design Guild Mark winners since 2008
  • BIFMA-tested commercial seating
  • Replaceable components on most pieces

DesignersMatthew Hilton · Terence Woodgate · Robin Day

Tanso Chair Cushion

UV- and mold-resistant Textilene wraps a supportive polyester fill, tailored to the Tanso Armchair's exact seat.

David Irwin's Tanso series for Case Furniture adds comfort through durable materials rather than visual bulk, and this cushion follows suit. Discreet toggle buttons hold it neatly to the armchair's teak seat, so the frame's craftsmanship stays the focus.

Materials

UV- and mold-resistant Textilene cover; polyester filling

Dimensions

20.5 in W × 15.4 in D × 0.8 in H

Fits

Tanso Armchair

Designer

David Irwin

Warranty

2 years

Common Questions

Which chair does this cushion fit?
The Tanso Armchair — it is cut to the armchair's seat dimensions and fastens with toggle buttons. The Tanso Bench uses its own longer cushion, sold separately.

Is it okay outdoors?
Yes for everyday use — the Textilene cover resists UV fading and mold. Bring it inside during long wet spells and over winter to extend its lifespan.

How do I clean it?
Wipe with water and mild detergent, then air-dry fully. Avoid abrasive cleaners; the tight Textilene weave releases most dirt with a simple wipe-down.

Shipping & Returns +

Ships within 2 week

2 Year Warranty

Country of Production +

Vietnam

Dimensions +

Height: 0.79”
Width: 20.47”
Depth: 15.35”

Care Guide +

To prolong the life of the product and retain its appearance and functionality, This unit is manufactured from solid wood. Craftsmen manufacture this product and there is variety between each unit. This is because wood is a natural product, with natural colour and grain variations.
Natural timber is affected by sunlight; this can can the wood colour to darken. It is recommended that no abrasive cleaners or solvents are used to clean the unit.

Case Sustainability Meter

Reviewed for sustainability by Comosum: Case scores 3.0 out of 5 (18 of 30) across six categories, from published evidence.

  • MaterialSolid oak, walnut, teak; no certificate3 out of 5
  • TransportationMostly made in Asia; tables in Lithuania3 out of 5
  • ManufacturingCountry of make stated for every product3 out of 5
  • LaborNo supplier code of conduct published2 out of 5
  • EnergyNo factory energy data published3 out of 5
  • DurabilityContract-rated; Cross table since 20064 out of 5
Total18 out of 30
3.0
Sustainability
grade out of 5
Brand-level score · Rubric v2.2 · Reviewed September 2026How we score

Shipping and Returns

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Flat-rate shipping from $10 by order total — your exact rate is shown above, next to the price. Orders over $1,500 ship FREE, freight and duties included. White Glove delivery is available at checkout on orders over $1,000 — $250 up to $1,500, $150 above it.

Returns

30-day returns in unused, original condition. Start a return at hello@comosum.co — we'll coordinate it with you.

Warranty

Every piece carries its manufacturer's warranty — typically 2 years or longer. We handle all claims for you at hello@comosum.co.

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