ALU Power is the top string on tour for a reason - the aluminum present in the string enhances playability to go along with impressive power and control. Its unique polyester composition exceeds all quality standards for near-zero string variance. Completely impervious to atmospheric conditions such as moisture, ALU Power delivers unrivaled consistent performance for championship-worthy results. The 1.30 mm gauge is slightly thicker than the 1.25, making it a more durable option.