yoga ball,gym ball,blance ball: material:PVC or eco-friendly ATBC ISO9001 & CE ... by various names, including Swiss ball, balance ball, birth ball, body ball, fitness ball, gym ball, Pilate ball, stability ball and therapy ball. It can also be used ... ball exercise should be ready to water and towels, at any time to add moisture. yoga ball,gym ball,blance ball,fitness ball,therapy ball,boby ball