The very latest born in the STRINGLAB house, is a masterpiece of studies, updates and tests, in the field and in the laboratory. The shaping of the string makes it more playable, and therefore usable even for arms less accustomed to hitting hard, and for rackets that need help to push. Perfect mix of synergies that gave birth to the Al13 tour LB, born from the already consolidated Alu Tour, from which it inherited the tension hold, to which the control and spin have been improved, thanks to a mixture of resins added to the polyester already rich in metal ionomers. The result is power, spin and great control, created especially for the most trained arms of agonists and big hitters.