Designed for the ultimate core workout, the Champion Sports Maxafe® Training Exercise Ball is constructed to facilitate strenuous use, making it a great choice for heavy-weight training while also gaining the core stability that comes from using an exercise ball. Can be used to perform a wide range of balance, core, strength, flexibility and rehabilitation exercises. Made with Flexton Silpower® material, this exercise ball will slowly deflate if damaged or punctured. For intense workouts, this exercise ball is sure to withstand the wear-and-tear that comes from regular use.