Chemosvit Fibrochem, s.r.o. is located in Svit under the High Tatras. The tradition of fiber production in Svit dates back to 1934. In 1974, the production of fine polypropylene fibers replaced viscose and later polyamide fibers. Over more than forty years of history, the Prolen® brand has been introduced to all continents of our planet and is used, among other applications, in thermal clothing of many well-known sports brands. Almost all thermo socks and thermal underwear in this e-shop are made of Prolen® polypropylene multifilament fiber, which is produced by Chemosvit Fibrochem, s.r.o. - a member of a strong group of companies Chemosvit, a.s.