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

Eternity Side Chair

Mater
Sale price$499.00
In Stock Items ship within two weeks

Designed by Mater, the Eternity Side Chair features a seat crafted from Mater's Matek composite—recycled coffee waste bound with ABS bioplastic—on a frame made from 20% recycled steel with a gunmetal powder-coated finish. Its streamlined profile makes it perfect for dining rooms, meeting spaces, and casual seating. Crafted with recycled coffee waste composite and recycled steel, it's part of Mater's commitment to sustainable, long-lasting furniture.

Available in Coffee Waste Black, Dark, Light, and Wood Waste Grey finishes, the Eternity Side Chair demonstrates that sustainable materials can be beautiful and durable. Material choices like upcycled coffee waste composite and recycled steel speak to Mater's focus on quality and environmental responsibility. The Eternity Side Chair is built to hold up over years of daily use, reducing the cycle of replacement that drives waste. Choosing well-made furniture is one of the simplest ways to live more sustainably without sacrificing style or comfort. Available at Comosum.

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.

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

Latvia

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.

Eco Friendly Furniture with sustainability Score 27/30

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The Comosum Standard

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Crafted with Care

From responsible materials to skilled hands - watch how quality is created

FDB Møbler: Danish Craftsmanship

See how timeless Danish design comes to life from raw FSC-certified wood to finished furniture.Highlighting the heritage of FDB Møbler, this video takes you inside the workshop where classic Danish modern pieces are produced with sustainable materials and meticulous attention to detail — rooted in a legacy of design since 1942.

Ethnicraft: The Journey of Solid Wood

From sustainable forests to finely crafted pieces — the making of Ethnicraft furniture.Discover Ethnicraft’s global production process as wood is selected, milled, and shaped across specialized workshops to create signature furniture that blends traditional woodworking with contemporary design.

Greenington: Bamboo Furniture

From forest to finished piece — the sustainable craft of Greenington bamboo furniture.This video showcases how Greenington uses responsibly harvested bamboo and certified eco-friendly processes to create durable, beautiful furniture while minimizing environmental impact.

Made to last chosen with intention.

Comosum's Ethos

At Comosum, we don’t just list any product; we meticulously curate them. Every piece at Comosum is selected for its quality, responsible materials, and long-term use in real homes. That means no throwaway items, no fast furniture, and no hidden shortcuts in craftsmanship. When you buy from us, you’re choosing pieces built to last, made by makers who stand behind their work so you can feel confident bringing them into your home.

Free shipping

Free delivery on eligible orders.

Customer service

Real help from real people here when you need us

Thoughtful Design, Honestly Made

We work with trusted makers who build quality pieces made to last.

Refer a friend

Share good design & get rewarded

Secure payment

Protected checkout with encrypted payment processing