Use the BOSU dome or platform side down, combine it with other equipment, or use it as a stand-alone product to make any exercise fun, challenging, and effective. The BOSU is made with a Burst-Resistant material and was designed to be used by professional athletes, some weighing as much as 350lbs or more. Also, the BOSU has a platform that is 25 inches in diameter and it inflates into a hemisphere 12 high when fully inflated.