The new ASTROX 99 TOUR is equipped with the POWER-ASSIST BUMPER system, tungsten-infused grommets installed at the top of the frame that transfer additional weight for more powerful hits. To improve defense, wider diameter grommets have been installed that are strategically placed on the sides of the frame, allowing the strings to move on impact to improve the reception of the shuttlecocks. The super-recognized Yonex ISOMETRIC frame has been modified by strengthening the corners of the frame to adjust the shape and increase the sweet spot of hitting.