Design and materials
This is a modular system comprising six individual stones housed in two silicone cases. Each stone weighs between 31 and 38 grams and measures 3 cm in diameter, with an overall length of 18.3 cm when inserted in a case. The set includes Pink Jade, Tigers Eye, Carnelian, Bianstone, Amethyst, and Crystal stones, each paired with a different stated intention—though the primary function remains pelvic floor exercise.
The silicone cases are designed to hold the stones securely during use. Because the stones themselves are the resistance element, the system is entirely passive—no batteries or charging required. The modular design means you can select which stone to use based on preference, though the practical differences between them relate to their weight and material properties.
What it's like to use
Kegel balls work by engaging your pelvic floor muscles as you move throughout the day or during targeted exercise routines. The weight of the stones—ranging from 31 to 38 grams—provides resistance that encourages muscle contraction and strengthening over time. Insertion is straightforward thanks to the silicone case, which also retrieves the stone easily.
Because there are six different stones, you can rotate between them based on which you have on hand or your preference that day. Some users find heavier stones more challenging, while lighter options may suit beginners. The interchangeable nature means this set can adapt as your strength and comfort improve. Consistency is key: regular use over weeks and months will yield the most noticeable results.
Cleaning and care
The silicone cases should be washed with warm water and mild soap before and after use. The stones themselves are non-porous and can be wiped clean or rinsed under running water. Allow all components to air dry completely before storage. This straightforward maintenance keeps the set hygienic and ready for repeated use.
Buy it if
Consider this set if you want a variable, long-term pelvic floor training solution without batteries or charging. The multiple stones offer flexibility and the option to vary your routine. It's also a good choice if you prefer a tactile, functional approach to exercise that doesn't require electronic components or app connectivity.
Skip it if
If you're looking for guided feedback, real-time coaching, or app integration during exercise, this manual system won't provide that. Likewise, if you prefer a single, fixed option rather than managing multiple stones, a simpler single-unit kegel ball might suit you better.
The bottom line
The Adrien Lastic Harmony Stones deliver a practical, modular approach to pelvic floor strengthening with no batteries needed and six interchangeable options to keep your routine varied. Results depend entirely on consistent, correct use over time. If you're committed to regular training and appreciate flexibility and simplicity, this is a solid choice. Comparing prices across retailers will help you find the best value for this comprehensive set.
Frequently asked questions
Do I need any special equipment or batteries to use these kegel balls?
No. The Harmony Stones require no batteries, charging, or electronic components—they work purely through resistance from their own weight.
Can I use just one stone, or do I need to use all six?
You can start with any stone you're comfortable with and progress at your own pace. The set includes six to provide options and allow you to vary your routine over time.
How often should I use them to see results?
Consistent, regular use over weeks and months is necessary. Aim for daily or near-daily use as part of your routine, though exact frequency should be determined by your comfort level and any guidance from a healthcare provider.
What's the difference between the six stones?
The stones vary slightly in weight (ranging from 31 to 38 grams) and are associated with different materials and named intentions. Practically, the weight variation allows progression and personalisation of your training.
Are these suitable for beginners?
Yes. The lightest stone (Crystal, 31 grams) is a good starting point, and you can progress to heavier options as your strength increases. Start with whatever feels manageable and build from there.