The feel and hardness is ideal for my purpose, especially as a warm-up exercise before climbing. However, the difference from the blue clay of Thera is larger than expected: the dough is especially heated when, much softer than the ball extent, the ball must be used cautiously, which you get after a short time a good feel for how to use the. Power is best dosed. The surface is very pleasant and smooth. The big advantage is that the shape remains stable even after the Chill of the material is adapted to the hand temperature through the workout.