FitBALL SPORT SOFT 65cm Black Ball Only Dimensions: 65 cm Weight Capacity: 1,250 lbs. FitBALL Sport Soft is the softer version of the FitBALL Sport and is perfect for physical therapy or as an exercise ball for improving flexibility, core and muscle strength, posture, and cardiovascular fitness Made of burst-resistant material that prevents rapid deflation when punctured Requires inflation (pump not included)