Elixir Polymer Coating Overview: Elixir Strings were the first coated string on the market, and what sets Elixir apart is the coating. It's a polymer coating that we actually enclose around a finished string. Wound strings are typically have a winding that goes around the core of the string and it creates what we call a critical zone of tone. And what happens is you will build up either oils or dirt from playing and from touching the guitar and it will corrode the string. With our patented polymer coating, available in two coatings, nano web and poly web, it protects the string and therefore gives you a lot longer life. A lot longer playing life. Three to five times from a conventional, uncoated string.