XS 80/20 Bronze strings are the brightest and longest lasting of any D’Addario coated acoustic guitar string, with no fraying, peeling, or tonal dampening, thanks to the ultra-thin XS film coating80/20 wrap wire provides bold, bright acoustic tone, with crisp projection that can fill a room.With a NY Steel core and Fusion Twist technology, XS 80/20 Bronze offers greater break strength and unmatched tuning stability—staying in tune 131% better than other acoustic strings.XS 80/20 Bronze strings come with a code which you can register to earn Players Circle points.XS coated acoustic strings are made in the USA—drawn to our exacting specifications at our New York production facility.