OEKO-TEX Standard 100 Explained
In brief: OEKO-TEX Standard 100 is the world's most widely recognised textile certification for human-ecological safety, testing finished products for harmful substances. Established in 1992, it verifies that textiles contain no chemicals at levels harmful to human health, testing more than 350 regulated substances. Products are graded into four classes by skin contact, from Class I for baby articles with the strictest limits to Class IV for decorative materials. Certification is renewed annually with product retesting, and around 20,000 manufacturers hold current certificates.
What is OEKO-TEX Standard 100?
OEKO-TEX Standard 100 is the world's most widely recognised textile certification for human-ecological safety. Its job is to test finished products for harmful substances. Established in 1992, the standard verifies that a textile contains no chemicals at levels harmful to human health, screening for more than 350 regulated substances. These include formaldehyde, heavy metals, pesticides, phthalates and allergenic dyes, the kinds of residues that can remain in a fabric after manufacturing. Because the focus is on the finished product and on human safety, it is one of the most directly relevant certifications for anyone concerned about what is actually in the clothing they wear next to their skin.
The four classes of OEKO-TEX
OEKO-TEX Standard 100 sorts products into four classes according to how much skin contact they have, with stricter limits for closer contact. Class I covers baby articles and carries the strictest limits of all, reflecting the sensitivity of infant skin. Class II covers items with direct skin contact, such as underwear and base layers. Class III covers products with no skin contact, like outer jackets. Class IV covers decorative materials such as furnishings. This graduated system means the testing is proportionate: the closer a textile sits to the body, the tougher the chemical thresholds it must meet to qualify.
Why does OEKO-TEX matter?
OEKO-TEX certification tests the finished product, which means every component, including the threads, buttons and trims, must pass individually rather than just the main fabric. The practical result is that a certified garment has been verified free of harmful chemicals above the established limits, component by component. For items worn next to the skin, such as underwear, base layers and baby clothing, that assurance is especially meaningful. The standard is also consumer-checkable: the OEKO-TEX Label Check system lets you verify a certification using the product's ID number. Certification is renewed annually with product retesting, and around 20,000 manufacturers across more than 100 countries hold current certificates.
OEKO-TEX Standard 100 at OD's Designer Clothing
At OD's Designer Clothing, OEKO-TEX certified fabrics appear across multiple brands in our collection. Look for the certification on products where you want reassurance about chemical safety, particularly for pieces worn close to the skin. Recognising the label helps you shop with confidence about what is in the cloth. We offer next-day delivery and free click and collect, and customers in the North West are welcome to visit our St Helens store to see our ranges.