Indigo Tunel holds ten independent certificates covering organic, recycled and responsibly sourced materials, renewable energy, social compliance and quality management, so brands can source rope-dyed indigo yarn and fabric with verified claims.
Our certificates
| GOTS | Global Organic Textile Standard: organic fibre with environmental and social criteria along the chain |
| OCS 100 and OCS Blended | Organic Content Standard: verified organic content, 100 % or blended |
| GRS | Global Recycled Standard: recycled content plus social, environmental and chemical requirements |
| RCS 100 and RCS Blended | Recycled Claim Standard: verified recycled content, 100 % or blended |
| Better Cotton | Responsibly sourced cotton |
| Sedex | Responsible supply chains: ethical trade data and audits |
| ISO 9001 | Quality management system |
| I-REC | International Renewable Energy Certificate: electricity matched with renewable generation |
Beyond certificates
- Follower of the United Nations Global Compact and its Sustainable Development Goals
- ZDHC-approved dyestuffs and chemicals throughout production
- Water pre-treatment on site; energy saving and recycled raw materials
- Zero-waste principle: all solid waste separated for on-site use or off-site recycling
- A responsible and inclusive employer and client
Sustainability policy
We aim to meet the growing demand for energy, water and products by making our production more sustainable, without compromising the needs of future generations. Sustainability is built into every business and every level of the company, and every employee is responsible for following this policy.
Frequently asked questions
Can you supply GOTS-certified indigo yarn?
Yes, with certified organic cotton yarn under our GOTS and OCS certificates. Ask us for the certificate scope and transaction certificates for your order.
What is I-REC?
The International Renewable Energy Certificate: a tracking certificate showing that the electricity we use is matched with renewable generation.
What does ZDHC-approved mean?
The dyestuffs and chemicals we use are on the ZDHC (Zero Discharge of Hazardous Chemicals) conformance list, so hazardous substances are kept out of the process.
Are you audited for social compliance?
Yes. Sedex membership and audits cover labour, health and safety, environment and business ethics at the plant.
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