SONEX Formula JP, a combination of a taut relatively hard, medium sponge, a taut top surface rubber and an impressive speed glueing sound. This is how top players will want to play in future. The sound encourages the joy of playing, whilst improving ball control. DONIC SONEX Formula technology ensures superb performance. For the power player who uses speed glue. Speed: 9+ Spin: 10 Control: 6 Available Thickness: 1.8mm, 2.0mm