Optimum MP combines STIGA's two highest-tech technologies: MP and Nano Composite. The MP top sheet is a mixture of 50% natural rubber and 50% synthetic rubber that produces a sheet with more tension and enhanced spin. The MP (Molecule Power) system greatly increases the energy release of the rubber when you strike the ball. STIGA has paired this high-performance top sheet with a fantastic medium sponge that incorporates STIGA's Nano Composite technology. Nano Composite technology embodies a new mixing technique that creates 50-100 nanometer sized grains. These extremely small grains produce stronger and tighter bonds to produce greater dynamic effect. And, the Nano Composite sponge plays great with either regular glue or speed glue.