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 6614lbs load and has been sgs labs tested as burst resistant at over 500kg 11023lbs static load it is designed for users who are over 510 1778cm tall and helps to maintain a healthy posture