Rubber Donic Bluestorm Big Slam

The Sound Machine Middle pored sponge, new lighter sponge technology. 42.5° sponge, Bluestorm's softest variation. Bluestorm Big Slam, the fifth version completes the series. For players who like the speed glue sound of earlier days, this is the soft variation and a great alternative. The extremely thin high tension top surface rubber, in combination with a new lighter sponge technology, ensures the best-ever feel.