External proof of quality

External certifications can be of great benefit to companies as they represent an official seal of approval for the quality and effectiveness of their products or services. This gives end consumers confidence in the quality and sustainability of the products.

ZKS uses raw materials with a wide range of certificates in the production of its yarns in accordance with customer requirements.

The Global Organic Textile Standard (GOTS) defines globally recognized requirements for natural fibres. ZKS uses GOTS-certified wool.

GOTS is a globally applied standard for the processing of textiles made from organically produced natural fibers, such as cotton. It defines environmental requirements along the entire textile production chain as well as social criteria.

The Oeko-Tex Standard 100 is a globally recognized certification system for textiles that ensures that products have been tested for harmful substances and meet health requirements.

The Responsible Wool Standard (RWS) is a seal of quality that certifies wool as ethically responsible. This voluntary global standard protects the sheep and the land on which they graze.

The Global Recycling Standard (GRS) is a certification standard that promotes the use of recycled materials in the textile industry. It was developed by the Textile Exchange organization and ensures that products that meet the GRS standard are made from recycled materials and meet certain social and environmental requirements.

ISO 9001 is based on four basic principles that guide the actions of an organization. It is the most widely used standard in quality management. ISO 9001 specifies the minimum requirements for the quality management system.