Ernie Ball Slinky Coated Electric Guitar Strings use advanced technology in their manufacturing. The wound strings are treated with nanotechnology to repel moisture and oils that can affect tone. Each plain string has a patented titanium reinforcement, which enhances strength, reduces breakage and slippage, and helps keep your guitar in tune. These coated strings maintain the feel and sound of uncoated sets, offering added protection along with the vibrant tone that Ernie Ball has provided for over 50 years.