The Wilson Ultra 100 Countervail tennis racquet is the most versatile racquet in the Ultra franchise. Featuring Countervail Technology that maximizes player energy and integrated power technologies that get the most boom for your buck, this racket is a game-changer for players of all levels and styles. PRODUCT FEATURES Power Rib throat geometry optimizes power through greater stability and stiffness Crush Zone grommet system compresses at impact to boost power and ball dwell time on strings Hotspot (hottest part of the sweetspot) increases by 15% for more explosive power Uncontaminated design features modern aesthetic with clean lines, bold color accents, midnight navy matte finish and smooth, velvety paint Integrated Countervail Technology maximizes player energy, consistency and precision Wilson Racquets WRT73731U