Possibly (okay, definitely!) inspired by a very memorable scene in the Fifty Shades of Grey legacy, the sexily simple Inner Goddess Silver Jiggle Balls hail from the official Fifty Shades collection, and they're ready to deliver deep, stimulating sensation while naturally strengthening key pelvic floor muscles. Kegel or ben-wa balls have been around for a very long time (Japanese courtesans are thought to have used them in the 1600's, for instance), but today, kegel exercise is a well known practice in gynecological/obstetric circles. Kegels- the act of consciously and repeatedly flexing the pelvic floor muscles- can help tighten up the pelvic floor. A tighter pelvic floor leads to improved inner snugness, better control of continence after childbirth or surgery, the possibility of stronger, more intense orgasms and an overall happier vagina. Put simply, the Inner Goddess Silver Jiggle Balls provide a great-feeling object for the pelvic muscles to grip during kegels- you'll have to flex to hold them in place. You can wear these jiggly little wonders anytime, anywhere for a discreet workout. Fair warning though, they feel really good, so you may have a hard time concentrating on any non-kegel tasks at hand!Identical in shape, 2 silvery balls come fixed to a body safe black cradle complete with long silicone retrieval cord. The Jiggle Balls, as the name suggest, come complete with a free-wheeling inner weight that bounces and jiggles for unique inner sensation during wear. The Jiggle Balls weigh about 2.3oz/67g, and are definitely suitable for beginner kegel practitioners. In high quality body safe silicone and ABS plastic, the Inner Goddess Silver Jiggle Balls clean easily using warm soapy water, but you you can also use a good toy care fluid/foam. Compatible with any favorite water based lube, but please avoid contact with silicone lubes and other silicone toys.*Balls measure about 8" (20.32cm) in total length. Approximately 4" (10.16cm) are insertable. Each ball is about 1.4" (3.56cm) in diameter.