D'Addario EXP15 Coated Phosphor Bronze Acoustic Guitar Strings. D'Addario have perfected the micro thin coating on these EXP Coated phosphor bronze extra light gauge acoustic guitar strings to make them last up to 5 times longer than uncoated strings whilst keeping their natural sound.

The coating prevents dirt building up in the windings of the wound strings as well as preventing corrosion of all 6 strings which normally saps the life out of your uncoated acoustic guitar strings.

In Extra Light gauge, the string thicknesses are 10, 14, 23, 30, 39, 47.