Iball Kegel Ball is designed accroding to the famous theory Kegel Exercise, and recommended widely by doctors. Kegel exercise trainer can train female pelvic floor muscles, help women easier delivery and faster postpartum recovery. It is designed especially for women who struggle with leaking urine when laughing, running, sneezing or coughing. Only about 15-20min per day and a few weeks, you will find your pelvic floor and bladder control ability make a difference. Unlike other common kegel weights balls, iball kegel ball adopts biofeedback technology, can real-time track your kegel training and give feedback for your exercise, guide and motivate you on correct training way. The outer material of Iball kegel ball is 100% food-graded premium silicone, it's comfortable and smooth.