GOTS vs OCS vs GRS vs OEKO-TEX: which certification do you need?
Four certifications, four different questions. What GOTS, OCS, GRS and OEKO-TEX Standard 100 each actually certify — and which one your claim needs.
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YF Journal — Erode, Tamil Nadu
Woven fabric guides from the mill.
Sourcing organic cotton, verifying a GOTS certificate, reading a GSM spec, choosing a manufacturer — the questions buyers actually send us, answered by the people who weave them in Erode, India.
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8 guides — Updated August 2026
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Fabric answers, not fabric marketing.
Yoga Fabrics has woven in Erode, Tamil Nadu since 2000 — 150+ Airjet and Rapier looms running cotton, linen, Tencel, modal, rayon and LENZING ECOVERO from 40 to 600 GSM, certified to GOTS, OCS, GRS and OEKO-TEX Standard 100.
These guides come out of that mill. If you are qualifying an organic cotton fabric supplier, working out which certification your claim actually needs, or asking why so much of India's woven fabric comes out of one district in Tamil Nadu, start below.
Certification & standards
What GOTS, OCS, GRS and OEKO-TEX each certify, how to verify a mill's licence before you place an order, and how an organic claim survives the chain.
GOTS certified fabric: how to verify a mill's certificate.
A logo in a footer proves nothing. How to check a mill's GOTS licence, read its scope, and get the transaction certificate for your own order.
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Organic cotton fabric suppliers in Erode: a sourcing guide.
Certified organic is a chain of custody, not a fibre claim — how to buy GOTS organic cotton fabric from Erode without getting burned.
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How to qualify a woven fabric manufacturer before the first purchase order — and why so much of India's woven fabric comes out of one district in Tamil Nadu.
Why Erode weaves for the world: inside Tamil Nadu's textile belt.
Why the Kongu belt around Erode weaves what it weaves — and what that cluster means for a buyer sourcing woven fabric from India.
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How to choose a woven fabric manufacturer: 8 questions that matter.
Loom mix, minimums, testing, lead times, certifications — the questions we wish every buyer asked before the first PO.
Read the guideFabric guides
The technical vocabulary of a woven fabric spec — weight, fibre and dye route — explained the way we explain it on a sampling call.
What is GSM in fabric? A complete weight guide for buyers.
GSM decides drape, cost and end-use before a single loom starts. How it is measured, and the numbers we actually weave at the mill.
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Cotton vs linen vs Tencel: a woven fabric comparison.
Drape, crease, cost, care and certification — the honest trade-offs between the three workhorse fibres on our looms.
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Yarn-dyed vs piece-dyed fabric: what actually changes.
Same fibre, same loom, different colour story. When dyeing happens changes cost, hand feel, strike-through and how a design ages.
Read the noteEditorial
Written by the people who weave.
Most fabric blogs are written by marketers. This one is written by a mill — production supervisors, quality managers and merchandisers who sit next to the looms in Erode and watch every lot ship.
Every guide starts with a real question from a real customer: a merchandiser unsure about GSM, a designer comparing linen and Tencel, a sourcing manager trying to tell a genuine GOTS certificate from a logo on a website. The answers are the ones we give in our daily mail — now written down.
Sasikumar G. — Founder & Managing Director
Ask the Mill
Can't find the answer you need?
If you are spec-ing a fabric, comparing constructions or planning a programme, send us the details — construction, GSM, quantity, certification needs. A member of the mill team, not a bot, replies within one business day. You can also browse the full fabric collection or read how we run the mill.
Ask a fabric questionFrequently asked questions.
How do I find a GOTS certified fabric manufacturer in India?
Start from the certification body's public database rather than a supplier's website, and check that the mill's scope certificate actually covers the processes you are buying — weaving, dyeing, printing or finishing. Then ask for a transaction certificate against your own shipment, because a certified mill can still ship an uncertified lot. Yoga Fabrics is a GOTS, OCS, GRS and OEKO-TEX Standard 100 certified woven fabric manufacturer in Erode, Tamil Nadu, and issues transaction certificates on request.
Where can I buy organic cotton fabric in bulk?
Buy from a mill that holds chain-of-custody certification itself rather than a trader reselling certified yarn, so the organic claim survives every step from ginning to finishing. Erode and the surrounding Tamil Nadu belt concentrate spinning, weaving, dyeing and processing within a short radius, which keeps that chain short. Yoga Fabrics weaves organic cotton wovens under GOTS and OCS from 40 to 600 GSM, in greige, dyed, printed and yarn-dyed forms.
Why is Erode, Tamil Nadu known for fabric manufacturing?
Erode sits in the Kongu belt of western Tamil Nadu, a long-established handloom, powerloom and textile trading centre. Spinning around Coimbatore, knitwear in Tiruppur, home textiles in Karur and dyeing and processing capacity around Erode itself mean yarn, weaving, dyeing and finishing all sit within a short radius — fewer custody handoffs and shorter lead times than a fragmented supply chain.
What is the minimum order quantity for custom woven fabric?
It depends on the construction and the colour route. A yarn-dyed programme carries a higher minimum than a piece-dyed one because the yarn has to be dyed before weaving, and a custom weave carries more than a stock construction. Send your construction, GSM, width and target quantity to contact@yogafabrics.in and we will confirm the minimum for that specific fabric.
Does Yoga Fabrics export woven fabric outside India?
Yes. We supply apparel brands, exporters and sourcing teams in India, the United States, the United Kingdom, Europe, Australia, Canada and the UAE from our mill in Erode, Tamil Nadu, and test every lot for count, GSM, colour fastness and shrinkage to US, EU and Australian benchmarks.