The Undulating Two-Part Body Coupled With The Fully Enclosed Weighted Balls Makes This Design Ideal For Women Who Wish To Strengthen Pelvic Floor Muscles And Create Gentle Vaginal Stimulations. Whether You Are A New Or Experienced User, These Kegel Balls Are A Subtle But Extremely Pleasurable Addition To The Bedroom. Silicone String Makes Removal Easy. Can Be Used With Any Water-Based Lubricant.