XT are our longest lasting classical strings, combining centuries of D’Addario expertise with modern coating technology. This XT Dynacore Half Set uses a revolutionary multi-filament nylon core processing technique to deliver unparalleled intonation, responsive attack, and crystal-clear projection—and with addition of our proprietary XT coating, a significantly extended lifespan. This Normal Tension set is our best-selling tension, preferred for its balance of rich tone, comfortable feel, and dynamic projection.