D'Addario 80/20 Bronze are bright acoustic guitar strings, made to give your tone an unparalleled shine. With the addition of revolutionary XS coating, these bold 80/20 strings obtain maximum life with an uncommonly smooth feel. Made with a NY Steel core, 80/20 Bronze wrap wire and Fusion Twist technology, these coated acoustic guitar strings have enhanced break strength and tuning stability over standard 80/20s, in addition to a dramatically increased lifespan.