What Is OEKO-TEX Certified? Standard 100 Explained for Bedding, Throws, and Rugs

You've seen the label on a throw, a duvet, or a rug: "OEKO-TEX Standard 100." It's one of the most widely used textile safety certifications, but it's also widely misunderstood. Here's what OEKO-TEX certified actually means, what Standard 100 tests for, how it differs from organic or sustainability labels, and how to check a certificate yourself.

What is OEKO-TEX?

OEKO-TEX is an international association of independent textile testing institutes. It publishes several labels; the one you'll meet most at home is STANDARD 100 by OEKO-TEX. It certifies that every component of a textile — fabric, thread, buttons, zippers, prints — has been tested against a list of substances harmful to human health.

What does OEKO-TEX certified mean?

A Standard 100 label means the tested product met limits for substances including:

• Formaldehyde
• Certain azo dyes and allergenic dyestuffs
• Heavy metals such as lead and cadmium
• Pesticide residues
• Phthalates and other regulated chemicals
• pH levels suitable for skin contact

The limits are reviewed and updated at least annually, and they're often stricter than national laws.

The four product classes

Standard 100 tests more strictly the closer a textile gets to skin:

Class	Covers	Examples
I	Baby and toddler items (up to age 3)	Crib sheets, baby blankets
II	Direct skin contact	Bed sheets, duvet covers, towels
III	Little or no skin contact	Jackets, padding
IV	Decoration and furnishing	Curtains, upholstery, rugs

For a duvet cover or sheets, Class II or better is what you want. For a rug or curtain, Class IV is normal and appropriate.

What OEKO-TEX does not mean

• It's not organic. Standard 100 tests the finished textile for harmful residues; it doesn't say how the fiber was grown. For organic fiber, look for GOTS.
• It's not a sustainability label. Environmental production is covered by separate OEKO-TEX labels (STeP, MADE IN GREEN), not Standard 100.
• It covers what was tested. A brand having one certified line doesn't make everything it sells certified.

For the wider landscape of eco and safety labels, see our sustainable furniture certifications guide.

How to verify an OEKO-TEX certificate

1. Find the certificate number and testing institute printed on the label or listing.
2. Enter the number in the official OEKO-TEX label check on oeko-tex.com.
3. Confirm the certificate is valid (they're renewed yearly), the product class matches your use, and the product type covers what you're buying.

If a listing says "OEKO-TEX" with no number, treat it as unverified and ask the seller.

Where it matters most at home

• Bedding — sheets, duvet covers, comforters, and pillows sit against skin for eight hours a night.
• Throws and blankets — especially ones children use.
• Rugs — kids and pets spend time on the floor; Class IV covers furnishings.
• Upholstery and curtains — less direct contact, but large surface area.

The Short Version

STANDARD 100 by OEKO-TEX certifies that a textile has been tested for harmful substances, with stricter limits for baby and skin-contact items. It's not an organic or sustainability label, it's renewed yearly, and it's per product — verify the certificate number before you rely on it.

Shopping for bedding? Shop Comforters & Duvets and look for a stated certificate on each listing.