Thanks to its pronounced ball curve the ?loud? variety of the Sinus series is making it the ideal partner to forgive almost all mistakes. Sinus Sound is softer than Sinus or Sinus Alpha thanks to its integrated speed-glue-effect sponge. It guarantees a great game sensation and optimal ball contact. Even during slow topspin exchanges Sinus Sound permits lots of spin and speed. Sinus Sound is the balanced combination of sound, spin, speed, sensation and control. This is the ideal rubber for players whose recurring focus is ball sensation.