The BOSU BALLAST® Ball 65 cm Fitness Ball in Blue is a revolutionary training tool designed to enhance core stability and balance. Unlike traditional exercise balls, it features a unique ballast system with 2.5 lbs. of multi-dimensional load, ensuring stability and preventing it from rolling away during workouts. This innovative ball boasts a six-sided surface design, promoting proper alignment and positioning for a variety of exercises. The ballast provides a fun, visual effect and audible feedback, making lifting, shifting, and shaking exercises more engaging and effective. Ideal for dynamic drills and exercise progressions, the BOSU BALLAST® Ball allows users to perform movements not possible with regular exercise balls. Its stability and unique design make it an essential addition to any fitness routine, offering a versatile and enjoyable workout experience.