Mater Eternity Arm Chair in FSC-certified oak, designed by Eva Harlou, B Corp certified Danish design
Mater Eternity Arm Chair in FSC-certified oak, designed by Eva Harlou
Mater Eternity Arm Chair in FSC-certified oak, designed by Eva Harlou
Sustainability verified

Eternity Arm Chair

Mater
Sale price$624.00

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

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In Stock Items ship within two weeks

Eternity Arm Chair

A slim steel armrest wraps Space Copenhagen's Eternity shell, molded from e-waste plastic and reclaimed fiber.

The Eternity Armchair pairs an organic-shaped Matek shell — post-consumer e-waste plastic recycled with coffee or wood fiber waste — with a light armrest of 20% recycled steel for Danish B Corp Mater. Sleek enough for dining rooms, durable enough for public interiors, it stacks and integrates easily across styles.

Materials

Matek shell (post-consumer e-waste plastic with coffee or wood fiber waste); 20% recycled steel frame, gunmetal powder coat

Dimensions

23.2 in W x 21.7 in D x 34.4 in H x 16.9 in seat depth x 18.5 in seat height x 26.8 in arm height

Designer

Space Copenhagen

Finishes

Coffee Waste Black, Coffee Waste Dark, Coffee Waste Light, Wood Waste Grey

Care

Wipe with a soft cloth wrung in lukewarm water; avoid abrasive cleaners and sharp objects

Common Questions

How wide is the armchair compared with the sidechair?
The steel armrest adds a slim margin on each side — enough for elbow support at the table without dramatically widening the footprint for tight dining layouts.

Can the Eternity Armchair be used in offices and cafés?
Yes — Mater builds the Eternity series for both private and public use, and the wipe-clean Matek shell suits high-turnover spaces.

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 +

Latvia

Dimensions +

Width: 23.2"
Depth: 21.7"
Height: 34.4"
Seat Height: 18.5"
Seat Depth: 16.9"
Arm Height: 26.8"

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

Shipping and Returns

Shop with confidence. Learn more about our shipping process, delivery estimates, and hassle-free return policy.

Shipping Info

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 from $150.

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.

Pairs Well With

Pieces that share the same design philosophy.

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Comosum's Ethos

Comosum is a US online retailer of sustainable, original-design furniture from more than 25 European and American design houses — Ethnicraft, Fermob, UMAGE, Heller, Anglepoise, FDB Møbler and Cane-line among them. We score every brand on our six-dimension Sustainability Meter before listing it, and ship across the contiguous 48 states.

We are curators, not a marketplace: no replicas, no unlicensed reissues, no fast furniture.

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