Extended life, coated steel strings.
Through advanced EXP Coated Technology, D'Addario has perfected the art and science of the coated string, making extended play string shtat sound identical to the renowned D'Addario XL series. A micro-fine layer of concentric EXP coating is applied to the wrap wire prior to winding, resulting in strings that deliver longer life, completely natural tone, and the feel of uncoated strings. Plus, the whole string set lasts 4 times longer thanks to D'Addario's exclusive compound-plated, plain steel strings, which offer maximum corrosion resistance. Includes an extra first string.