Comosum Learn

Sustainable furniture, explained

Buying guides, material comparisons and plain-English explanations of the labels you'll see on furniture, from Comosum, a Brooklyn retailer of original-design furniture. Every brand we carry is graded on six published categories, and every buying guide shows live prices and stock.

Researched, written and checked by Comosum. Every claim comes from the maker, an independent certifier or our product records. How we write our guides · How we grade brands

Buying guides

Shop with a guide

Each guide answers one buying question, then shows the pieces we'd choose, with prices, stock and Meter grades read live from our store.

Labels, decoded

What the labels on furniture actually prove

Each label answers one question. Pick yours to see which ones count, and what each can't tell you.

  • FSCForest Stewardship Council

    Proves
    The wood came from responsibly managed forests, tracked through every owner and factory to the finished piece.
    Doesn't tell you
    What's in the glue, finish or foam, or how long the piece will last.
    How to check it
    Ask for the licence code (FSC-C plus six digits) and look it up at info.fsc.org.
    What is FSC? →

  • PEFCPEFC Council

    Proves
    The same question as FSC, answered through the national forest standards PEFC endorses. Common on European wood.
    Doesn't tell you
    What's in the glue, finish or foam.
    How to check it
    Ask for the PEFC certificate number and check it in PEFC's online database.
    FSC and PEFC compared →

  • GREENGUARD GoldUL Solutions

    Proves
    A finished product's chemical emissions were tested in a chamber against limits on more than 360 VOCs and total emissions, set for sensitive groups such as children.
    Doesn't tell you
    Where the wood came from, or how the factory treats its workers.
    How to check it
    Look up the exact model in UL's SPOT directory. A brand-wide claim isn't a certificate for the piece you're buying.
    What is GREENGUARD Gold? →

  • Nordic Swan EcolabelNordic Ecolabelling

    Proves
    For the labelled product: limits on formaldehyde and VOCs in glues, panels and finishes, no halogenated flame retardants, and at least 70% certified wood.
    Doesn't tell you
    Anything about the brand's other products. It's issued product by product.
    How to check it
    Look for the swan logo and licence number on the product listing.
    What is the Nordic Swan? →

  • OEKO-TEX Standard 100OEKO-TEX Association

    Proves
    Every part of a textile, from thread to zip, was tested against more than 1,000 harmful substances. Product Class 1, for babies and children up to 3, is the strictest.
    Doesn't tell you
    Anything about the frame, foam or wood under the fabric.
    How to check it
    Enter the certificate number in the label check on oeko-tex.com.
    What is OEKO-TEX? →

  • B CorpB Lab

    Proves
    The whole company met B Lab's verified standard for social and environmental performance, and is re-verified every three years.
    Doesn't tell you
    That a particular product is low-emission or made from certified wood.
    How to check it
    Find the company in B Lab's B Corp directory.
    What is B Corp? →

  • ISO 14001Independent certification bodies

    Proves
    An independent body audited a company's environmental management system at the sites the certificate names.
    Doesn't tell you
    A product's materials or emissions. The standard sets no numeric limits.
    How to check it
    Ask for the certificate and which factory it covers.
    What is ISO 14001? →

  • STURDY tip-over ruleUS CPSC

    Proves
    A dresser or chest made after September 1, 2023 passed three stability tests, one with a child's weight, and ships with an anti-tip kit.
    Doesn't tell you
    Anything about materials or chemistry. It's a mandatory safety rule, not an eco label.
    How to check it
    Ask the seller, then install the anti-tip kit.
    Nursery storage, explained →

  • ANSI/BIFMA X5.1 · EN 16139BIFMA · CEN

    Proves
    A seat passed strength and durability tests written for commercial use. X5.1 covers office seating and stools; EN 16139 covers non-domestic seating.
    Doesn't tell you
    Emissions, materials or where it was made.
    How to check it
    Ask which standard, and which year, the model was tested to.
    Seating standards, explained →
Watch for
  • "LEED-certified" furniture. LEED rates buildings and interior projects, not products. A piece can count toward a project's low-emitting materials credit when its maker supplies emissions data.
  • "Non-toxic" or "eco-friendly" on their own. Neither has a fixed definition. Ask which test or certificate backs the word.
  • FSC as a health claim. FSC tells you where the wood came from, not what's in the glue or finish.
  • A brand-wide certificate. Emissions and textile labels are issued per product, so check the model you're buying.
Every label in the glossary → How labels count in the Sustainability Meter →

Side by side

Compare materials and makers

All 10 comparisons →

Head-to-head comparisons, so you can choose on evidence rather than adjectives.

The makers

Why we carry each brand

Who makes it, where, and what each maker can show.

All 29 maker stories →

The library

Every guide and article

Showing 125 of 125

How these are made

Guides you can check

  • Claims with a source

    Every factual claim comes from the brand's own published material, an independent certification body or our product records. If we can't verify it, we leave it out. How we write our guides

  • Every brand graded

    Each maker we carry is scored on six published categories: Material, Transportation, Manufacturing, Labor, Energy and Durability. How the Meter works

  • Live prices and stock

    Buying guides read prices, stock and Meter grades straight from our store, so they're current when you read them. Spot an error? hello@comosum.co

Made to last chosen with intention.

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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