Durability, reliability, safety and efficiency are the best words to describe this premium exercise ball. Premium Exercise Ball is manufactured and designed for professional use and demanding environments. The production protocol is unique. Each ball is filled with air and inspected before packaging and each ball is marked with a production batch so that production can be controlled. Continuous quality control and testing system ensure production quality and reduce the risk of failure. Testing by SGS found that the Premium Exercise Ball showed no signs of damage even though a 200kg weight was placed on it 12,000 times. The ball is unbreakable up to 350kg and with a static load it can withstand 1000kg. Superior resistance to stretching and deformation makes it the highest quality fitness ball available.