nano S/speed control is perfect for controlling the ball in all situations in a match. This rubber has this state of the art sponge of technology built in to enrich your allround control play. nano S/speed control has a softer sponge that helps to regulate offensive rubbers without the loss of control.nano S/speed control allows returns with chop or attacking shots during a counter rally easier than ever. Hardly any other rubber is as forgiving or as ciontrollable as GEWO nano S/speed control. You will dominate and control your opponent right from the very first service.