Elixir strings use a unique and advanced polymer coating technology to protect the strings from sweat, body oils, and dirt, preventing corrosion. These innovative guitar strings preserve the high-quality sound of new strings for longer, and are highly praised by numerous professional and amateur musicians worldwide. Optiweb coating features an innovative lightweight coating that delivers the same tone and feel as non-coated premium strings. Custom Light gauge (.009 .011 .016 .026 .036 .046)