Core: MultiEva rubber, which uses two layers of different foam densities for a mix of power on hard shots and comfort on soft ones.Surface: Glaphite—a special blend of carbon fiber and fiberglass that gives a soft, elastic feel with excellent ball output.Frame: 100% CarbonTube for durability and structural strength.XForce: A reinforced system in the racket's heart that adds rigidity and stability.3D Grain: A rough, polygonal textured surface that helps you add more spin and slice to the ball. Weight : 371 gr...