BL=Basalt. Basalt is a natural volcanic rock. It can be used in manufacturing where it is made into fine gold fibers with incredible vibration resistance. These new fibers are woven longitudinally with [K}arophite Black to create one of the most advanced composites in the industry.
Provides a superior, enhanced feel while increasing racquet power and reducing weight with a full Basalt expanded handle and a new shock-absorbing engineered urethane polymer. The full Basalt handle filters out unwanted vibrations and transmits a cleaner feel, giving the player a heightened sense of the ball. The specially engineered urethane absorbs some of the shock for more of an arm-friendly feel. Watch the Wilson Amplifeel 360 video