RAKZA 9 is one of several rubbers with the newly developed top sheet using mainly natural rubber gum. This improves the level of grip and the power of spin drastically. The top sheet is combined with the new Power Sponge. The top sheet and Power Sponge work in perfect synergy, producing the Hybrid Energy rubber.Yasaka RAKZA 9 is the latest addition to the Yasaka RAKZA family with improved speed characteristics.The surface rubber of Rakza 9 has a newly developed formula/rubber combination. In addition the new sponge is made of a more homogenous material and has larger pores. Rakza 9 is the fastest of Yasaka’s Hybrid Energy rubbers and is suitable for technical offensive players using both high speed and spin to win the point.