Evolution, the top of the line rubber series from TIBHAR. Evolution offers two different categories of rubber types to get the most out of your specific playing style; -S and -P. The Evolution -s line employs a unique rubber mixture resulting in a softer topsheet. A rubber of this caliber allows for better feedback. This results in even more potential to produce spin on the ball, more feeling for exact placement, and more control and safety on all of your strokes. This helps you hit those winning balls that will take you to the next level! Having the softest sponge of the Evolution -S rubbers, it provides the most stroke security among the entire Evolution series! Even with this considered, FX-S is not suitable for beginners as it has substantial potential for speed and is an advanced level rubber. FX-S is the way to go for players looking for controlled attack, exact placement, and good speed.