Made to let you improve flexibility, muscle tone, balance and strengthen the core muscles, the Fitness Mad 300kg Anti Burst swiss ball 75cm can be used during Fit Ball workouts, yoga and Pilates sessions, as well as physiotherapy. This tough, yet lightweight ball is rated as suitable for a 300kg (661.4lbs) load and has been SGS Labs tested as burst-resistant at over 500kg (1102.3lbs) static load. It is designed for users who are over 5\'10\" (177.8cm) tall and helps to maintain a healthy posture when used as a chair. The ball offers a max. diameter of 75cm (29.5\'\').