Yonex VCore 98 Plus Tennis Racket, a speedy racket with great spin potential and controllable power. Material: HM Graphite, Nanometric XT, Namd. Recommended string: Polytour Strike, Polytour Pro, Rexis. Aero Trench – For easy manoeuvrability. An innovative design created to reduce air resistance by shielding the grommets at the top of the frame for faster swing speeds. This makes the racket 11% more aerodynamic. Isometric -Isometric racket shape. For enhanced sweet spot. A square-shaped isometric racket generates a 7% larger sweet spot for greater control without sacrificing power. Liner Tech – For increased ball pocketing. Newly engineered straight hole grommets allow for more string movement on the outer areas of the racket to increase spin. This gives more contact time between the ball and the string bed. New Aero Fin – A faster frame for more spin. EnhancedAero Fin technology above the throat creates a faster, thinner frame for increased ball-pocketing. Namd Graphite Frame – For ball-crushing spin. Grip the ball and fire-off aggressive, attacking spin with Namd, a revolutionary graphite with unique flex and fast frame snapback. Unless a restring is selected, this racket will be supplied unstrung.