An ultra-fine layer of EXP Coating is bonded to the silverplated copper wrap wire which is then wound onto a multi-filament core. The result is a built-in barrier against the corrosion and wear that can quickly sap the life out of your strings and your sound. EXP coated silverplated copper classical strings have a natural round wound feel and sound fresh and bright with a "new string tone" that lasts three to four times longer than traditional guitar strings.

EXP44, extra hard tension, is optimal for maximum string resistance and projection without compromising tone.

D'Addario EXPs are the most natural-sounding, longest-lasting coated strings available. EXP Coated Technology starts with the highest quality wrap wire materials, precision drawn and micro coated on our advanced proprietary machinery. The ultra-fine layer of EXP Coating is bonded to the silver-plated copper wrap wire which is then wound onto a multi-filament core. The result is a built-in barrier against the corrosion and wear that can quickly sap the life out of your strings and your sound. EXP coated silver-plated copper classical strings have a natural round wound feel and sound fresh and bright with a "new string tone" that lasts three to four times longer than traditional guitar strings.

D'Addario, the world's largest manufacturer of musical instrument strings, is known as The Players Choice with a reputation for unsurpassed quality and consistency. D'Addario's innovative packaging reduces waste and provides protection from corrosion. All D'Addario strings are manufactured in the U.S.A. using proprietary, digitally controlled, state-of-the-art machinery for unmatched performance, set after set.