Joyballs are specially designed to strengthen the pelvic floor using advanced German technology. For greater pleasure during sexual intercourse. As an effective method for postpartum uterine involution. To prevent and help treat incontinence. Trampoline effect = effective oscillations of the lower sphere. Very quiet. Made of Silikomed material - the material of the future. Non-irritating to mucous membranes and very gentle on the skin. Dermatologically and clinically tested. Tested by the German Association for Technical Inspection. Durable and easy to clean. Suitable for all types of lubricants. The new Joyballs are 100% made in Germany with strict quality controls and 100% phthalate-free silicone. Ball diameter: approx. 3.5 cm, Weight: 83 g