
* NOTE: We use the term “Kegel balls”. Other names such as “Ben Wa balls”, “Geisha balls” or “vaginal balls” are used here with the same meaning.
Incontinence, back pain or problems during sexual intercourse are typical signs of a weak pelvic floor in women. Not only after pregnancy or during the menopause – any woman can be affected. Genuine medical Kegel balls* can strengthen the pelvic floor muscles, but not all products do. The term “medical Kegel balls” is often used yet says nothing about actual effectiveness. Only Kegel balls* that are certified as medical devices must prove their efficacy – like Viball®.
Viball® Kegel balls* are the only Kegel balls* with certification as a medical device in the EU.
And they deliver the highest possible stimulation worldwide – proven.
They stimulate your pelvic floor muscles simply by wearing them in everyday life – even without active training. They also heighten erotic sensation more intensely than other Kegel balls*. Viball® unites effective pelvic floor training and sensual pleasure in one high-end product. And there’s more to discover …

Despite imaginative exteriors, even the best sex toys often hide major design flaws:
We at Theros® set out to create “the best Kegel balls* in the world”. The result:
Viball® is the perfect combination of an effective tool for pelvic floor training in all day life and high end sextoy for intense erotic stimulation.
We offer single balls or twin sets at a reduced price, six sizes and different weights for intense sensation and optimum hold. Viball® Kegel balls* are made of pure implant-grade steel. Unlike silicone, this premium material is fully body-friendly and absolutely sustainable.
And as a certified medical device, its safety of use – and above all its effectiveness – is proven.
Tips on determining the optimum size: “Which size for which application?”
The size ratio of the inner and outer spheres is precisely calculated. This enables the highest possible vibration for pelvic-floor training and/or erotic play in each of the six sizes.
Even without active workouts, Viball® trains your pelvic floor simply through wear. For quicker results, try our dedicated pelvic-floor exercises with balls.
Viball® Kegel balls* have another unique feature: they can be inserted completely into the vagina and move naturally with your pelvic-floor muscles. The effective range is significantly extended – unlike products with loops/straps or hourglass shapes that get stuck in one position. Viball® moves and stimulates the entire pelvic floor, the G-spot and the cervix.
Retrieval strings or loops are impractical under clothing, tell-tale, and act as “bacterial bridges” from outside into the vagina – often causing disturbed flora or UTIs. They are NOT necessary except in rare cases (e.g., cramping, scarring or injuries). Our decision: do without them. Thousands of women show: no problem at all.
Removing a Viball® is simple. The enclosed instructions for use (24-page booklet) explain every step. For rare cases where anatomy, cramps or scarring make removal difficult, each Viball® comes with a special application sleeve to support removal (by gentle pulling) if needed – so you can try it risk-free. Rectal application (e.g., for haemorrhoids) is also possible without a sleeve. More details in the manual, under “Frequently asked questions about Viball®” and in our topic guides.
Silicone absorbs odours and discolouration and – especially with long-term wear – raises hygiene and health concerns. It must be replaced regularly and, as a disposable product, burdens the environment. It also dampens the vibrations that matter most.
Viball® Kegel balls* are made of implant-grade steel – a costly, premium, but unmatched material:

Viball® is one of the very few Kegel balls* worldwide certified as a medical device – and the only one made of hypoallergenic implant-grade steel. To be approved, pelvic-floor training aids like Viball® must prove their effectiveness, unlike conventional erotic products. Medical devices must also meet strict legal safety requirements: use without strings/loops is guaranteed safe. They must not contain toxic substances – implant steel meets clinical standards even with very long dwell times.
Don’t settle for less!
Wearing Viball® in everyday life or during sport produces varied stimuli on the pelvic-floor muscles, depending on movement. Many impulses are barely noticeable – they particularly activate the sphincter muscles. With regular use, Viball® Kegel balls* are highly effective against incontinence. And you can wear Viball® anywhere – it’s invisible to others.
Implant-grade steel also enables easy, hygienic rectal use of Viball® Kegel balls* against haemorrhoids. A single ball or a suitable set can reposition haemorrhoids and, with long-term use, prevent recurrence. Acute inflammation can even be soothed with cold therapy using a frozen ball: the outer shell provides moderate cooling for hours. More details: “Treat haemorrhoids with FMS dilators and Viball®.”
Too little contact between a (small) penis and a (wide) vagina often leads to reduced sensation and orgasm difficulties for both partners. A Viball® of the right size can compensate: a perfectly round sphere offers no friction surface and the polished finish is extremely gliding. You get intense contact without irritation of the vaginal wall or the penis. Gentle vibration mimics mild contractions and amplifies perception. With Viball®, both partners experience a new, intense feeling of unity.
Viball® are the only Kegel balls* that sit completely inside the body and are invisible from the outside. They remain your personal sensual secret wherever you are – after sport in the shower, in the sauna, even during sex. Thanks to the perfectly round shape and polished surface, Viball® Kegel balls* are not perceived as a foreign body by your partner’s penis – only through the gentle narrowing effect and soft vibration, similar to mild contractions. Whether you share your secret is up to you …
“Questions & answers about Viball®” provides more information. We also cover specific topics in our topic guides. If you have therapeutic questions about using your Viball®, our customers can email me personally – I’ll be happy to help.
Contact: hsw@theros.de
Hera Schulte Westenberg

Quality, safety, guarantee