Reviewed for sustainabilityComosum Meter · Mater 3.8 / 5Show the six category scores

Earth Stool with Backrest is made by Mater. We review every brand we carry against published evidence in six categories; Mater scores 3.8 out of 5 (23 of 30).

  • Material 5 out of 5FSC wood, waste-based Matek; Wallpaper* 2019
  • Transportation 4 out of 5Mostly made in Latvia, Slovenia, Denmark
  • Manufacturing 4 out of 5EU partners; Bo Bedre sustainability award
  • Labor 4 out of 5EU partners bound by supplier code
  • Energy 3 out of 5No energy data published
  • Durability 3 out of 533 spare parts sold; 2-year warranty
Brand-level score · Rubric v2.2 · Reviewed September 2026How we score

Earth Stool with Backrest

Sale price$624.00

Shipping: $54 flat · FREE on orders $1,500+

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

Size: Standard

Size

Color: Recycled Coffee Dark

Color

In Stock Items ship within two weeks

Earth Stool with Backrest

Danish architect Eva Harlou gives her press-molded coffee-waste seat a curved backrest here, and the stool becomes somewhere to stay.

The seat and back are Matek, the compound Mater developed with the Danish Technological Institute from coffee shells supplied by the roaster BKI and recycled post-consumer plastic. Press molding turns that waste into one smooth, pebble-textured piece, carried on a gun-metal powder-coated steel frame. It is the most sculptural silhouette in our Mater collection, and the back is what makes it work through a whole evening rather than a quick coffee.

Materials

Matek composite seat and backrest: coffee-shell waste from BKI coffee bound with recycled post-consumer plastic; steel frame with gun-metal powder coating

Dimensions

14.5 in W x 10.6 in D; seat height 27.2 in with 39.0 in overall, or seat height 29.1 in with 40.9 in overall

Designer

Eva Harlou

Made in

Denmark

Colors

Recycled Coffee Dark

Care

Wipe the Matek seat and the powder-coated frame with a damp cloth; avoid abrasive cleaners, solvents and prolonged direct sun

Common Questions

How is it different from the standard Earth Stool?
The backrest. Both share Eva Harlou's press-molded Matek seat of coffee-shell waste and recycled post-consumer plastic on a gun-metal steel frame; this version adds a curved back for longer sittings.

Which height should I order?
Choose the 27.2-inch seat for kitchen counters around 36 inches and the 29.1-inch seat for bar counters of 40 inches or more, keeping about 10 inches of clearance under the counter.

What is the seat made of?
Coffee shells from BKI coffee blended with recycled post-consumer plastic into Matek, a compound Mater developed with the Danish Technological Institute and press-molds into a single solid piece.

Mater +

Mater is a Copenhagen-based design house pioneering sustainable innovation since 2006. Every piece tells a sustainability story—from FSC-certified wood and recycled ocean plastic to upcycled coffee waste and reclaimed mango wood. Collaborating with visionary designers, Mater fuses high-quality craftsmanship with environmental ethics, creating furniture that respects both people and planet.

Shipping & Returns +

In Stock Items Ship Within 7-10 Business Days * We will contact you to confirm any extended lead times for out of stock or backorder items

Country of Production +

Denmark

Dimensions +

Width: 14.6"
Depth: 10.6"
Height: 39.0"
Seat Height: 27.2"
Seat Depth: 10.6"

Care Guide +

To maintain the finish quality of your Mater product, please follow the care and cleaning procedures provided. Dust regularly with a soft, dry cloth. For wood surfaces, use a damp cloth with mild soap and dry immediately. For recycled composite surfaces, wipe with a damp cloth. Avoid harsh chemicals, abrasive cleaners, and prolonged sun exposure. Re-oil wood products periodically as needed.

Mater Sustainability Meter

Reviewed for sustainability by Comosum: Mater scores 3.8 out of 5 (23 of 30) across six categories, from published evidence.

  • MaterialFSC wood, waste-based Matek; Wallpaper* 20195 out of 5
  • TransportationMostly made in Latvia, Slovenia, Denmark4 out of 5
  • ManufacturingEU partners; Bo Bedre sustainability award4 out of 5
  • LaborEU partners bound by supplier code4 out of 5
  • EnergyNo energy data published3 out of 5
  • Durability33 spare parts sold; 2-year warranty3 out of 5
Total23 out of 30
3.8
Sustainability
grade out of 5
Brand-level score · Rubric v2.2 · Reviewed September 2026How we score

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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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