FX-S is the little brother of the EL-S. The FX-S has the enormous spin values of the MX-S combined with the power of the MX-P. The sponge of the FX-S is softer than the sponge of the EL-S, so that the FX-S combined with a personalized pimple geometry is more elastic and generates ‘flexible spin’. The FX-S is much softer than the MX-P and MX-S, but slightly harder than the FX-P. FX-S significantly distinguishes itself from the medium rubbers EL-P and EL-S.