Production of natural fibre inserts Slovenia

If you are looking for a partner who combines decades of expertise, sustainable materials and advanced manufacturing technologies, KO-SI d.o.o. stands among the European leaders in the production of natural fibre inserts in Slovenia. With more than 50 years of development, innovation and global presence, we transform renewable natural fibres into high-quality technical products for industries across the world.

Organic fibre products

Since 1970, KO-SI has been committed to producing sustainable materials based on plant and animal fibres. Our company began by supplying the automotive and furniture industry and has since evolved into one of the most respected manufacturers of natural fibre products in Europe. Today, we export to more than 30 countries, and our customers include some of the most recognized international corporations.

As specialists in the production of natural fibre inserts in Slovenia, we remain dedicated to quality, responsible sourcing and continuous innovation. All materials are carefully selected from certified suppliers around the globe. Our strategic fibres include:

• coconut fibre,
• sisal,
• hemp,
• sea grass,
• jute,
• lyocell,
• horsehair,
• sheep wool,
• cashmere,
• camel hair.

We use natural latex as a binder and ensure that all raw materials are obtained through environmentally friendly and humane processes.

Manufacture of organic fibre linings

KO-SI d.o.o. processes more than 6,000 tons of natural fibres per year and produces over 5 million square meters of products annually. Our extensive expertise allows us to deliver a broad range of solutions for various industries:

• Mattress & Bedding Industry
  • Our natural fibre inserts provide breathable, durable and comfortable support. They are used as intermediate layers or top layers in premium mattresses.
• Upholstered Furniture
  • Natural fibre inserts offer firmness, elasticity and long-lasting comfort, making them ideal for sofas, chairs and high-end furniture.
• Gardening & Landscaping Program
  • We create biodegradable mulches, erosion-control mats and plant protection products made from coconut, wool or hemp. Sustainable solutions for nurseries, farms and landscape designers.
• Natural Packaging
  • Our biodegradable packaging elements from natural fibres protect goods during storage and transport, offering eco-friendly alternatives to synthetic materials.
• Construction Industry – Natural Insulation
  • We produce thermal and acoustic insulation based on coconut and other fibres. These materials ensure a healthy living environment and meet modern ecological standards.
• Air Filters
  • Natural fibre inserts for industrial filters provide high air quality in warehouses, production halls and controlled environments.
• Shoe Inserts
  • Our fibre-based components form the foundation for high-quality shoe insoles. They are durable, breathable and environmentally friendly.
• Pet Care Products
  • We manufacture biodegradable cage pads, nesting materials and bedding for pets — a natural and simple solution for animal comfort.

High quality products from natural fibers

As a leading company in the production of natural fibre inserts in Slovenia, KO-SI invests heavily in research, technological development and new manufacturing methods. Our in-house R&D department covers:

• concept development,
• laboratory testing,
• prototype application,
• creation of new production lines,
• ongoing technological improvements.

During development we ensure that every product meets both industry requirements and strict environmental standards. This approach guarantees competitive, long-lasting and sustainable solutions for global markets.

Our environmental responsibility is reflected in our ISO 14001 environmental management certification, introduced in 2004 and maintained consistently. Every product is conceived with its full life cycle in mind — from sustainable sourcing to end-of-life recyclability.

With more than 100 skilled employees, KO-SI combines tradition and knowledge with modern production. Every member of our team contributes to the high quality that our global partners appreciate.

If your company needs reliable, innovative and sustainable solutions in the production of natural fibre inserts in Slovenia, KO-SI d.o.o. is the partner you can count on. Contact us and discover how natural fibres can enhance your products — naturally, responsibly and efficiently.