Our optional P.T.F.E. (polymer tetra-fluoro-ethylene) coating is a proprietary process of combining a dry inert plastic with a carrying agent of rubbing alcohol. This lighter coating doesn’t dampen frequencies and is applied over the finished string, allowing more wire to wire contact for more brilliance. P.T.F.E. lubricates the string, protecting it against oils, acids and oxidation, resulting in less fret wear, less chording noise, longer life and a smooth, silky touch.