Combined with the 729 Sponge this is a Chinese classic, fast and hard with control. 729 FX can easily generate offence and spin. Feels almost the same as RITC 729. Generates slightly more spin, speed is comparable with classic RITC 729. FX has that classic 729 feel, but with increased spin, If your goal is an allround rubber with an emphasis on topspin attack Super FX is a great choice. Probably the worlds best selling reverse rubber since 1970s.