In the 1970's, engineers of the company were the first to develop round, flexible air hoses in a unique sandwich design. This invention made the transport and installation of ventilation systems much easier and led to considerable cost savings. The multi-layer structure allows the production of various air hoses optimized for specific applications, including hoses with special features (e.g. sound-insulated designs). Today, DEC International® is one of the world's leading companies in this field whose products are sold in 50 countries.