Apparel Certifications Explained: OEKO-TEX, GOTS, bluesign, and More

Sustainability certifications in apparel are both genuinely important and genuinely confusing. I talk to brand owners regularly who want to make credible sustainability claims but are not sure which certifications mean what, which ones their customers actually care about, and whether they are worth the cost.

The honest answer is nuanced: some certifications are rigorous and meaningful, some are useful marketing tools with modest actual requirements, and some are essentially pay-to-play schemes with minimal verification. Knowing the difference protects your brand and ensures you are making investments that deliver real value.

OEKO-TEX Standard 100: The Most Widely Recognized

OEKO-TEX Standard 100 is probably the most widely recognized textile certification globally. It tests finished textile products and certifies that every component — fabric, thread, buttons, zippers, labels — has been tested for harmful substances and found to be safe for human health.

What it certifies: The absence of harmful chemicals at levels that could be dangerous to human health. This includes pesticide residues, heavy metals, formaldehyde, pH levels, colorfastness, and hundreds of other potentially harmful substances.

What it does NOT certify: Environmental production practices, fair labor standards, or any sustainability claims beyond chemical safety. A product can be OEKO-TEX certified and be made using environmentally destructive processes by underpaid workers in unsafe conditions.

Four product classes exist based on who wears the product:

For most apparel brands, Class II is the relevant certification. For baby or children's brands, Class I is the appropriate target.

The OEKO-TEX Standard 100 certification is held by the fabric or component manufacturer, not by you as the brand. To use the OEKO-TEX label, you need to source certified materials and go through an authorization process. Your manufacturer can tell you which of their fabrics are certified.

GOTS: Global Organic Textile Standard

GOTS is the leading standard for organic textiles. It covers the entire production process from harvesting raw organic fiber through to garment manufacturing and labeling.

To be GOTS certified:

This last point is critical: GOTS certification is a supply chain certification, not just a materials certification. You cannot buy organic fabric and have it sewn at an uncertified factory and call it GOTS certified.

GOTS has two labeling levels:

GOTS is particularly relevant for cotton-based brands — organic cotton, organic linen, organic wool. It does not apply to synthetics like polyester because synthetics cannot be "organic."

bluesign: The Performance Fabric Certification

bluesign is a certification specifically relevant to the synthetic/performance fabric market — polyester, nylon, and blended technical fabrics used in activewear and outdoor gear.

bluesign certifies that the yarn and fabric production process meets standards for:

For activewear and sportswear brands that cannot use GOTS (because their products use polyester, not cotton), bluesign fabric certification is a meaningful sustainability claim. Major outdoor brands like Patagonia, The North Face, and Arc'teryx use bluesign fabrics extensively.

Like OEKO-TEX, bluesign certification is held by the fabric manufacturer. As a brand, you source bluesign-certified fabrics and can then reference that certification in your marketing. The certification does not cover the garment manufacturing step — only the fabric production.

Fair Trade Certification

Fair Trade certification focuses on labor and economic justice rather than environmental practices. A Fair Trade certified factory meets standards for:

Fair Trade garment certification requires the entire production process to be certified, including both the fabric production and garment manufacturing.

For brands whose customers care primarily about human rights and fair wages rather than environmental impact, Fair Trade is more relevant than GOTS or bluesign.

GRS: Global Recycled Standard

GRS (Global Recycled Standard) certifies that a product contains recycled content and verifies the chain of custody from the recycled material source through to the final product.

GRS is highly relevant for performance apparel brands using recycled polyester or recycled nylon. Recycled polyester made from post-consumer plastic bottles (rPET) is a popular sustainable material story in activewear. GRS certifies that the recycled content claim is accurate and independently verified.

GRS certification requires verification at each step of the supply chain — the fiber producer, yarn spinner, fabric mill, and garment manufacturer. A brand cannot simply use recycled fabric and claim GRS certification without all links in the chain being certified.

B Corp Certification: Company Level

B Corp certification is different from the fabric/product certifications above — it certifies the company rather than the product. A B Corp certified brand meets standards across governance, workers, community, environment, and customers.

For apparel brands, B Corp certification is a holistic indicator of a company's commitment to social and environmental responsibility. It is a rigorous process requiring documentation and third-party assessment. Major fashion B Corps include Patagonia and Eileen Fisher.

What Should Your Brand Actually Pursue?

My honest recommendation based on working with brands across various market positions:

If you are just starting out: Focus on finding certified materials (OEKO-TEX Standard 100 as a baseline, bluesign or GRS if using synthetics) and being honest in your marketing about what you have certified and what you are working toward. Do not over-claim.

If you are targeting eco-conscious consumers: GOTS for organic cotton products, GRS for recycled synthetic products, and eventually bluesign for performance fabric sourcing. These are the certifications your target customers recognize and value.

If sustainability is a core brand pillar: Plan for B Corp certification as a medium-term goal. It requires operational maturity but delivers comprehensive credibility.

At all stages: Avoid vague claims like "sustainable" or "eco-friendly" without specific certification backing. These claims are increasingly scrutinized by regulators and consumers alike.

At Mughal Apparel, we source OEKO-TEX certified fabrics and can supply GRS-certified recycled polyester and nylon for brands with sustainability requirements. We are transparent about what we can certify and what we cannot. Get a free quote and let us know your certification requirements — we respond within 24 hours and start at 50 pieces per style.