
* NOTE: We use the term “Kegel balls”. Other names such as “Ben Wa balls”, “Geisha balls”, “vaginal balls” or “pelvic floor training balls” are equivalent for the purposes of the information provided here.
Incontinence, hemorrhoids, back pain or problems during sexual intercourse – all of these are typical signs of a weak pelvic floor. This does not only affect women after pregnancy or during menopause – any woman can be affected.
Suitable Kegel balls* can strengthen the pelvic floor muscles. However, in my practice I found that conventional sex toys cannot achieve this. And while the term “medical Kegel balls” is often used in advertising, it says very little about actual effectiveness.
That is why we at Theros® wanted to develop the best Kegel balls* in the world.
The result:
And all of this with a Class I Medical Device certification – the effectiveness of Viball® has been clinically proven.
Viball® Kegel balls* stimulate your pelvic floor muscles effortlessly in everyday life – even without active exercises. At the same time, they intensify your erotic experience more than any other Kegel balls* – demonstrably.
And they can do even more. Let yourself be surprised …
✅ Six sizes from 36 to 60 mm – for every woman and many different applications
✅ Maximum possible vibration through precisely calculated components
✅ Without a string, invisible to others – use anytime and anywhere
✅ Made from anti-allergenic implant-grade steel – 100% free from harmful substances
✅ Additional stimulation through up-and-down movement inside the vagina
✅ Also suitable during sexual intercourse – for more contact and sensation
✅ Certified medical device with clinically proven effectiveness

Viball® fits perfectly – without slipping out. Whether your vagina is narrow or highly accommodating, whether you prefer gentle stimulation or complete fullness. Whether you are 20 or 70 years old, whether you have given birth or not. Tips on finding the optimal size can be found under “Which Size for Which Application?”. Because Viball® can do so much more …
In Viball® Kegel balls*, the size ratios between the inner and outer ball have been calculated precisely. This creates the highest possible vibration in each of the six sizes – for pelvic floor training and/or erotic stimulation. The material also plays an important role: nothing transmits vibrations and oscillations more intensely than metal. After all, have you ever seen a gong made from silicone?
Viball® Kegel balls* have another unique feature: They are inserted completely into the body – allowing especially discreet use anytime and anywhere. Without a string, they can glide up and down within your vagina in interaction with your pelvic floor muscles. This significantly expands their area of action – unlike hourglass-shaped Kegel balls that can become “stuck” in one position. Viball® stimulates the entire pelvic floor musculature, the G-spot and the cervix.
Retrieval strings or loops are impractical and revealing – and not infrequently these “bridges for bacteria” have a negative effect on the vaginal flora or urinary tract. Therapeutically, they are only required in rare individual cases. Our conclusion:
Get rid of them. And thousands of women prove it: no problem! A completely new wearing experience – total freedom. And nobody knows …
Removing a Viball® is very easy. In the enclosed instructions for use, we explain everything step by step. For the rare case that anatomical characteristics or a tendency to tension make removal more difficult, every Viball® includes a medical application sleeve for “the first time”. This allows you to assist removal by pulling if necessary. If you genuinely have a health condition and generally require application sleeves, they are available in our shop at a low price.
Anal use (for example against hemorrhoids) is also perfectly safe without a sleeve. Further details can be found under “Frequently Asked Questions About Viball®” and in our many guides.
Silicone absorbs odours and discolouration and – especially during long-term use – raises hygiene and health concerns. It must be replaced regularly and, as a disposable product, places a burden on the environment. In addition, silicone dampens the vibrations that are essential for effectiveness.
Viball® Kegel balls* are made from implant-grade steel – a very high-quality, expensive but irreplaceable material:

To be approved as a medical device, pelvic floor training aids such as Viball® must demonstrate their effectiveness – unlike erotic products. Medical devices must also comply with strict safety requirements – use without a string is guaranteed to be safe. And they may not contain toxic substances: implant-grade steel fulfils clinical requirements even during very long periods inside the body. Do not settle for less!
When wearing a Viball® in daily life or during sport, different stimuli are created for the pelvic floor muscles, depending on your movements. Much of this happens almost unnoticed: these subtle impulses particularly activate the sphincter muscles. As a result, Viball® Kegel balls* are highly effective against incontinence when used over longer periods. And you can truly wear your Viball® anywhere – it remains invisible to others.
Implant-grade steel also allows simple and hygienic anal use of Viball® Kegel balls* against hemorrhoids. A single ball or a suitable set can reposition hemorrhoids (push them back into the tissue) and, with long-term use, help prevent them from prolapsing again. In addition, implant-grade steel does not promote inflammation. Acute cases of inflamed hemorrhoids can even be relieved through cold therapy with a frozen ball: the outer shell provides gentle cooling for several hours.
Too little contact between a (small) penis and a (wide) vagina is often the cause of reduced sensation and orgasm difficulties for both partners. A ball of the appropriate size can compensate for this: a smooth ball provides no friction surface, and the polished surface is extremely slippery. This creates intense contact without irritation to the vaginal wall or penis. The gentle vibration conveys the sensation of soft contractions and intensifies perception. With Viball®, you can experience a new and intense feeling of union.

Viball® Kegel balls* have no string – which makes them invisible from the outside and allows them to remain your sensual secret in every situation: after sport in the shower, in the sauna – even during sex. Thanks to their perfectly spherical shape and polished surface, Viball® Kegel balls* are not perceived as a foreign body by your partner’s penis, but only through their narrowing effect and gentle vibration.
Whether you tell anyone your secret – and whom – is entirely up to you …
Under “Frequently Asked Questions About Viball®” you will find further information, and in our guides we cover many specialised topics relating to intimate health.

Quality, Safety, Warranty