D'Addario XSAPB1356 XS Phosphor Bronze 13-56

D'Addario XS Acoustic Phosphor Bronze combines our most popular acoustic alloy with our most advanced string coating technology, resulting in clear tone, smooth feel, and superior tuning stability — all with the longest possible string life. Available in Phosphor Bronze for 6 and 12-string acoustic guitar, ranging from extra-light to medium gauges. XS is breathing new life into coated strings. With its ultra-thin film coating on every wound string and a unique polymer treatment on the plain steels, XS offers our highest level of protection, for maximum life with an uncommonly smooth feel. XS also features NY Steel high carbon core and plain string wire, along with our exclusive Fusion Twist, for incomparable break strength and tuning stability. XS is the most innovative coated string ever created. Setting XS apart from other strings is the new, impossibly thin film coating (1/10 the thickness of a human hair) that completely protects the wound strings from corrosion, without dampening the tone. This new film covering is combined with D'Addario's proprietary dispersion coating, used in their XT line, to protect the plain steel strings as well.