The Donic BlueGrip C2 is the second generation of the Donic Bluegrip rubbers with tacky topsheets. It has a softer sponge compared to the Donic BlueGrip C1. The stronger catapult effect, in regard to the first generation of the Bluegrip rubbers, makes it suitable even as a backhand rubber for top players. Rubber Type: Pimple IN Rubber Brand: Donic Sponge: Mid-Hard Topsheet: Tacky