The new technology combined with ultra soft rubber surface provides an outstanding spin and great playing sensation, allowing a secured and aggresive game. The intergrated SPI (Speedglue Effect Inside) technology confers an extreme catapult reaction to the ball. Although you will use very little strenght, your balls will be loaded with a lot of spin and speed. The exclusive rubber surface confers stability and a long life expectacy. Notice the energy of this rubber after only few exchanges.