Using certified virgin materials to make our garments lies at the heart of DENHAM’s sustainability values. This is why we have a number of certifications in place to ensure all the materials we use are verified and were produced accordingly. The organic cotton we use for our garments is certified in accordance with Global Organic Textile Standards (GOTS), the Organic Content Standard 100 (OCS 100), depending on the origin and the vendor. For man-made cellulose textiles such as Tencel/Lyocell, the FSC certification applied, while for recycled yarns, we use ones which hold a Global Recycled Standard.




The Global Organic Textile Standard (GOTS) is said to be the world's leading textile processing standard for organic fibers. It includes ecological and social criteria compliance regulated and backed-up by independent certification of the entire supply chain.


The Organic Content Standard (OCS) is a global standard for tracking and verifying the content of organically grown materials in a product. The OCS verifies the exact amount of organic material in a product.


The Global Recycling Standard (GRS) is an international and voluntary product standard which lays out the requirements for third-party certification of recycled content input and chain of custody for a product. The main goal of the standard is to increase the use of recycled materials while adhering to the chain of custody requirements from the Content Claim Standard.


OEKO-TEX is a registered trademark and represents the product labels and company certifications issued by the International Association for Research and Testing in the Field of Textile and Leather Ecology (OEKO-TEX for short).


The Sustainable Apparel Coalition (SAC) a groundbreaking industry collaboration, which is open to members from the apparel, footwear and textile industry. Members are committed to measuring and improving social and environmental sustainability impacts.

ISO 9001

ISO 9001 is an international standard that specifies requirements for a quality management system (QMS). Organizations use this standard to demonstrate the ability to consistently provide products and services that meet customer and regulatory requirements.

ISO 14001

ISO 14001 is the international standard which specifies requirements for an effective environmental management system (EMS). It provides a framework which an organization can follow, rather than establishing environmental performance requirements.