Our recycled golf balls have been restored without altering the manufacturer's original specifications to play like new. The Taylormade 2013 released of the Rocketballz (RBZ) Urethane features a cast urethane cover over a thin mantle layer to improve ball speed and to control spin on wedge shots. They increased the size of the core and lowered the compression to improve feel and spin on tee shots. Three dozen balls contained in black mesh bag for storage and portability.