First introduced by David Weck in the year 2000, the BOSU Pro Balance Trainer (aka the Half Blue Exercise Ball) has remained an industry standard for over two decades. The innovative design is uniquely equipped for training on both the round top and flat base portion of the unit (BOSU = “Both Sides Utilized”). The patented, dually over-molded platform offers next level stability, and is meant to withstand continual daily gym usage. Athletes of any skill level and from any discipline can benefit from using the BOSU Pro Balance Trainer for a wide range of movements; from core and cardio work to basic balance and mobility drills.