Butterfly Sriver FX: Compared to the SRIVER, the SRIVER-FX's sponge is about 10% softer, giving more spin and control. Offensive players with a topspin based style will be delighted in the dynamics of this top rubber offering much variation power and control. You can experience the glue-feel, time and time without adding glue. Most importantly, players will enjoy the fact that no change in tecnique is required when using Powerspin rubbers. Power Sponge rubbers are designed so that the continual application of speed glue is not necessary. Therefore, a Power Sponge rubber should not be removed from the original blade it was applied to as the rubber will shrink several millimeters in size. Once the rubber shrinks it loses tension and will not perform as intended.
Speed: 10, Spin: 8, Control: 8
Sponge thickness: 1.3mm, 1.5mm, 1.7mm, 1.9mm, 2.1mm, Max
Colours: red and black