RAKZA 7- Soft is the newly developed rubber by YASAKA, using mainly natural gum for the top sheet. This improves the level of grip and the power of spin drastically. The shape/geometry of the pimples are designed to give a good balance between speed and spin. The topsheet is combined with with the newly developed sponge - �Power Sponge� enabling huge elasticity. Together they work in perfect synergy, producing the �Hybrid Energy� rubber RAKZA 7. When the player hits the ball hard , the rubber �grips� the ball and the stroke can be used to place the ball accurately, both in direction and length. The serve and short returns are very sharp and easy to handle. Thanks to the higher proportion of natural gum the life expectancy of the rubber has increased. Similar to "RAKZA 7" the "RAKZA 7 - Soft" has a slightly softer sponge undersheet that gives the rubber more sound, more arc, and spin. Interested? Buy one today. Speed: 88 Spin: 96 Control: 71 Hardness: 37-42 Sponge Thickness: 1.8,2.0,Max