Sigma 1 Pro is a fast rubber from Xiom with a hard sponge. The sponge is similar in hardness to that of Tenergy 05 however, the throw angle is noticeably lower. Despite the lower throw it is still very fast so topsins and counterloops are not hard to land. It has a lot of control despite being so fast and is good to block with if you know what you are doing. This rubber is a definite recommend for either forehand or backhand.
