There are about a million and one sexy benefits of glass sex toys, and that's barely even an exaggeration! Glass is hypoallergenic, nonporous, compatible with any favorite lube, and pleasantly weighty, just for starters. When it comes to glass kegel tools, though, that benefit count shoots up even higher. The Yoni Eggs from gläs are super-smooth, body safe, and shaped for perfect kegel practice plus deep, stimulating sensation.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 gläs Yoni Eggs 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 them 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 and differing ever-so slightly in size, each egg can be used alone or together. The balls weigh approximately 1.6oz/45g  and 1.45oz/41g  separately, and about 3.3oz/86gIn ultra hygienic pyrex glass the gläs Yoni Eggs are hypoallergenic and extra low maintenance. Pre and post play, rinse with warm soapy water or use a good quality toy care fluid/foam. Any favorite lube will be compatible with your Yoni Eggs. Please store carefully to avoid scratching or chipping.*Balls measure about 1.6-1.75"/4-4.4cm in total length