Sinus Alpha possesses a softer sponge and develops its strengths especially during a passive game, because it provides even better control. It is not as fast as its harder twin; however, it transmits unequalled precision during fast topspins and blocking balls. Balls played with this rubber have a longer and evenly curved trajectory, putting even more pressure on the opponent. TIBHAR Sinus Alpha is the ideal rubber for players looking for unlimited dependability, in addition to acceleration.