Medical Kegel Ball Kit is made out of premium medical grade silicon, an FDA approved material. It has an ergonomic design with CE safety certification and RoHS authentication.Love eggs – or Ben Wa balls, jiggle balls, love balls – are designed to help you locate your pelvic floor muscles and work them effectively. Also known as Kegel (which is their proper name) are inserted into the vagina – and by holding them in and clenching around them, you’ll target and strengthen the correct muscle groups.