Effective training for advanced users. This set consists of three heavy kegel balls and helps you enjoy more pleasure through muscle tightening. The C03 Duo set is well-suited for advanced kegel ball users. For beginners, we recommend the Satisfyer C02 kegel balls or the Satisfyer C03 Single kegel balls. Thanks to their ergonomic shape and soft silicone, the Satisfyer Balls are easy to insert. The retrieval cord is barely noticeable and makes removal after use easier. The balls will help strengthen your vaginal muscles. Training with these kegel balls can strengthen your pelvic floor, potentially leading to more intense orgasms. These results have already been confirmed by various doctors and gynecologists. You can experience this special workout at your leisure. The small balls are silent and can be used whenever you desire. The kegel balls can also be used for bladder weakness or postpartum to aid in the recovery and strengthening of the pelvic floor muscles. These kegel balls can also be used with lubricant. However, make sure to only use water-based gels, as silicone-based products can damage the material.