TIBHAR SINUS was developed especially for high-performance sport. Because high performanceplayers always favoured harder sponges for powerful play, TIBHAR SINUSwas purposely fitted with a relative hard sponge in response. It is almost impossibleto surpass this rubber. During stroke execution players feel that they can transmittremendous speed to the ball despite small movement. The sponge combined with theadhering and elastic Sinus surface impresses by its rotation behaviour, giving advantagesto the player during topspin strokes but also and especially during services andshort exchanges. A new rotation era has now being achieved. Despite the relativelyhard sponge, SINUS provides the ever popular fresh-glue sound.