This racquet is made with a new-generation, high strength and resilient carbon fiber developed by Toray Industries, Inc. Here are the technologies involved in this racquet: Sonic Flare System: The revolutionary new graphite material TORAYCAR M40X and SUPER HMG provide unrivalled power and stability for maximum shuttle acceleration. Super HMG: This ultra-elastic material produces sharper power for all shots. 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. Super Slim Frame: This thin frame provides greater head speed and a solid feel. NEW Grommet Pattern:The single-pass grommet hole construction provides more grommet holes for a more high-performance stringing pattern.