Nanometric Improves The Bonding Strength Between The Carbon Fibers Enabling Us To Take Racquet Shaft Construction To Another Level. By Reducing The Amount Of Carbon In The Shaft To Make It 60%* Thinner Than A Conventional Racquet Whilst Retaining Stiffness, Yonex Has Created A Revolutionary Lightweight Racquet With Lightening Head Speed And Control. Nanometric Is The New Material Which Applies The Nanoalloy tm Technology Of Toray Industries, Inc. Combines Solid Hitting Feel And Quick Swing. The Built-In Solid Feel Core Cuts Harmful Miscellaneous Vibration At Impact. Solid Feel Core Is Carried In All Racquets.