Thomastik-Infeld flat-wound Swing, round-wound BeBop, and George Benson sets define the term "jazz guitar strings." And for good reason. Their specially formulated steel material, round core, and tightly wound outer wrap technologies blend clarity, definition and warmth for THAT sound and feel. Add a well deserved reputation for exceptionally l-o-n-g life, make Thomastik-Infeld strings the logical choice for all serious players of the art form. Your sound starts with the vibration of the strings. Buy a set today and prove it for yourself...we've been using Thomastik-Infeld strings exclusively for years!