The SIGMA Series has integrated the instant adhesive effect into the Hyper Elasto rubber. Thanks to this newly built internal Mechanic Boost, the rubber has gained so much in quality without illegal aids in every area that instant adhesives are now a thing of the past. A historic development in rubber production for professional players. The black CARBO underlayer is the start of the new generation of Hyper Elasto IMF. The special stud geometry ensures the greatest possible dynamics. The black CARBO underlayer, in combination with the IMB top layer, ensures an even better ball return.