Yonex Astrox 88D Game Badminton Racket is suitable for doubles game while Astrox 88D Game is specially developed for those who love to allow shuttle to hold on string bed. With extra hold shuttle time, player will get extra time hence extra control on shuttle mainly helps in exception net area drop shots and smashes. To further improve the control, YONEX uses the Energy Boost Cap concept. Energy boost cap concept is unique shape of cap which allow shaft to move freely while control shape of cap restricted the shaft movement against the twisting. This combination of both will offer better control and fast smash ability. Technologies Used: Isometric : The square-shaped Isometric frame shape is designed to keep vertical strings at a similar length, as well as the horizontal strings to produce an expanded sweet spot in all directions. Aero + Box Frame : Combines solid hitting feel and quick swing. Isometric: The square-shaped Isometric frame shape is designed to keep vertical strings at a similar length, as well as the horizontal strings to produce an expanded sweet spot in all directions. Rotational Generator System : By applying the counterbalance theory, weight is distributed throughout the grip end, frame top and the joint for maximum control. The transition to the next shot can be performed smoothly, with rapid succession. Slim Shaft : Designed to slice through the air, generating speedy power. Energy Boost Cap Plus : Uniquely shaped cap which maximizes shaft performance. The front allows the shaft to flex, while the sides arch-shaped curve stabilizes the racquet face by preventing the shaft from twisting. Nanomesh Neo : Ensures a stronger more flexible frame, while increased shaft flex creates maximum power.