Wilson Envy 110 UL Racquet Technologies
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.
Wilson Envy 110 UL Racquet - Where to go from here