Yonex VCORE Pro 100 (280g) Matte Green Tennis Racquets : The latest collection of Yonex VCore tennis racquets features the advanced technologies needed to help players implement greater power and dominate the game. The Yonex Pro 100 (280g) tennis racquet was made for aggressive players who want more control and better feel. Used and endorsed by pro player Stan Wawrinka. Lock Booster: Improved grommet design promotes string contact for efficient energy transfer and power. Namd(TM): Revolutionary graphite is incorporated into the racquet's throat, where it maintains its flex during fast swings and supports heavy drives. Improved Throat Design: Featuring a thinner beam, longer shaft, and lowered throat for optimum torque and superior spin. Vibration-Dampening Material: Stretchy mesh is wrapped around the graphite within the grip to filter unwanted vibrations. Creates 4% more spin, 2.7% more speed, and +10cm of bounce height.