Elixir

Elixir® Strings was founded in 1995 and are the pioneers of polymer coated strings.
The basic idea: a microscopically thin, advanced polymer tube that surrounds the string to protect it from corrosion and dirt without making any contact whatsoever with the critical area between the windings where the "critical zone of tone" is found and each perfect note is born.
For these and many other reasons, Elixir Strings have struck a serious chord with musicians around the world. Whether you’re playing for yourself or for an arena packed with fans, players report their tone lasts longer than any other string, uncoated or coated. This means you buy fewer sets of strings, change them less often, and trust that your guitar is ready to go when you are.