D'Addario XS Coated Electric Guitar Strings

"XS is breathing new life into coated strings. With an ultra-thin film coating on each 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 our most innovative coated string ever created."