XL Chromes are D'Addario's warmest, mellowest electric guitar strings. Beloved by jazz guitarists, as well as blues legends like Gary Clark Jr., these flat wound strings provide the smoothest feel and warmest tone, while allowing movement across the fretboard with no finger noise. Made with a high carbon steel core, Chromes’ stainless steel flattened ribbon wire is expertly wound onto a series of interlocking under-windings, then precisely polished for unparalleled smoothness and a sound which blends beautifully into any mix. 11-50 Jazz Light is the best selling gauge of flat wound strings, delivering the optimal tension for traditional jazz playing.