Market leaders in interlinings for the fashion industry.

Flex Internacional S.A., manufactures a wide variety of interlinings with different colours, widths and weights, in order to respond to the ever-increasing variety of outer fabrics.

Since 1946

We have been manufacturing interlinings since 1946. Our history and strive for perfection make us the best provider of supplies for manufacturing this type of fabrics.


Thermo-adhesive interlinings for men and women

Horsehair and hair

Hair interlinings. Delivered in rolls or pre-packaged.


Tie interlinings in rolls or die-cut.

Shirts and blouses

Interlinings for shirting. Conventional and adhesive woven interlinings. In rolls or die-cut.

Excellent customer service

Quick and personalised response to any inquiry. Flexibility to adapt to any technical requirements.

Consistent quality

Total control and monitoring throughout the entire process enables us to achieve the highest standards, including the use of high quality raw materiasl and appropriate finish.

Cost reduction

Significant and consistent cost reductions: Our experience and knowledge gathered throughout the years allow us to make our processes more efficient.

International presence

Over 20 countries

We are proud to be European market leaders and have a strong international presence with our own commercial agents and distribution centres in over 20 countries. SPAIN (Central Barcelona, Galicia, Madrid) PORTUGAL – FRANCE – GERMANY – ENGLAND – ITALY – ROMANIA – BULGARIA – SERBIA – MEXICO – MONTENEGRO – MACEDONIA – CROATIA – GREECE – LITHUANIA – MOROCCO – ALGERIA – TUNISIA


Flex interlinings is committed to the environment.

We hold the GRS CERTIFICATE (GLOBAL RECYCLED STANDARD) allowing us to offer interlinings made with recyclable polyester to our customers. The OEKO-TEX STANDARD 100 CERTIFICATION is the world’s best-known eco-label for textile products. The products with this label have been thoroughly tested and certified by world-renowned institutes. With this label, the consumer can be certain that our products are free of harmful substances.