Fibres Designed To Maintain Good Ventilation And Keep Skin Dry. The Coolmax Fibers Have Four- Or Six-Channel Forms To Allow Better Breathability Compared To Natural Fibers (E.G. Cotton), As Well As More Efficient Moisture Transfer. Prolen Siltex Is Yarn With An Addition Of An Anti-Bacterial Substance Based On Biogenic Silver Ions (Ag+) Which Prevent Bacteria And Fungi Growth, Reduce Bad Odour, Maintain Biological Balance Of The Skin And Ensure Long-Lasting Freshness. It Is Also Both User And Environment Friendly.