This unique development from LKT has two different sides. One side (Soft) has a low rebound coefficient, so that the ball is slowed down. This allows returning short over the net, with a maximum spin reversal when blocking and give a good feeling of the ball. The trajectory is very low in order to prevent the opponent from immediately attacking it.
The other side (Сarbon) is faster so that the ball can be attacked forcefully by the use of offensive rubbers.