XtoysAdrien Lastic Harmony Stones Kegel Balls Review
Editor's opinion
The Harmony Stones set pairs pelvic floor training with six semi-precious stones housed in washable silicone cases. It suits newcomers and anyone wanting a low-fuss, no-power routine, but the 31g to 38g range is a modest spread, so committed trainers may outgrow it.
Kegel trainers are one of the more practical items in this category, and the Adrien Lastic Harmony Stones set leans into that: no batteries, no charging, just a weighted insert to help engage the pelvic floor. The novelty here is the material, with six different semi-precious stones each sitting inside a smooth silicone case.
The question worth weighing is what that variety actually gives you. Most of these stones share the same weight, so the set is really about presentation and choice of material as much as graduated resistance. Understanding that before you buy will set the right expectations.
The good and the bad
What works
- Body-safe silicone cases that are simple to wash and store
- No batteries or charging, so it is always ready to use
- Two cases let you swap stones without extra faff
- A genuinely gentle entry point for pelvic floor beginners
- Compact 3 cm diameter suits those new to insertable weights
What to be aware of
- Weight range is narrow, from 31g to 38g, limiting long-term progression
- Five of the six stones weigh the same, so the variety is largely aesthetic
- Silicone requires a water-based lubricant, never silicone-based
- Semi-precious stones are a design flourish rather than a functional benefit
Buy it if
People starting pelvic floor exercises who want a light, low-maintenance set with no power to worry about, and who like the idea of choosing between different stones.
Skip it if
Anyone already training who needs meaningful step-ups in weight. If you want clear progression, look for a graduated set spanning a wider range, from lighter starter weights up to 60g or more.
Design and materials
The set is built around silicone cases that hold interchangeable semi-precious stones. Silicone is the sensible choice here: it is non-porous, body-safe and easy to keep clean, which matters for anything insertable. The 3 cm diameter is modest, which makes the set approachable for those who have never used weighted balls before.
At 18.3 cm in stated length, the measurement almost certainly includes a retrieval element rather than describing the insertable portion, which is far shorter. The two cases are the practical heart of the set, letting you rotate stones without buying anything extra.
How the weights actually progress
The marketing frames this as a set you can build up through, and there is some truth to that. Crystal sits at 31g, Amethyst at 37g, and the remaining four, Pink Jade, Tiger's Eye, Carnelian and Bianstone, all weigh 38g.
That means the real progression is a single small step from 31g to the high 30s. It is a fine range for a beginner finding their feet, but it is a narrow band. Anyone expecting a ladder of increasingly demanding weights should know the jump between lightest and heaviest is only seven grams, and most of the stones are effectively identical in resistance.
The stones themselves
The six semi-precious stones, Pink Jade, Tiger's Eye, Carnelian, Bianstone, Amethyst and Crystal, give the set its identity. It is worth being clear-eyed about this: because they sit inside sealed silicone cases, the stones are not in contact with the body, so any claims about the properties of particular crystals are decorative rather than physical.
What they do offer is variety and a sense of ritual, which some people value in a routine. Treat them as a pleasant touch rather than a reason to buy, and judge the set on its practical merits.
Care and cleaning
Silicone is straightforward to look after. Wash the cases before and after each use with warm water and a suitable toy cleaner, then let everything dry fully before storing. Because the body is silicone, use only a water-based lubricant; silicone lubricant can degrade the surface over time.
Store the cases and stones separately from other silicone items where possible, and keep them somewhere clean and dry. With no electronics to worry about, upkeep is minimal.
How it compares
Against a typical single-weight Kegel ball, the Harmony Stones set offers the flexibility of two cases and interchangeable inserts, plus the appeal of the stones. Against a proper graduated training kit, though, it falls short on range, since dedicated sets usually offer several distinct weights spanning a much broader spread.
If your priority is a considered progression from beginner to advanced, a wider graduated set is the better tool. If you want something gentle, simple and a little bit special to start with, this set holds its own.
The bottom line
The Adrien Lastic Harmony Stones set is a tasteful, well-made entry point to pelvic floor training, with body-safe silicone and the convenience of needing no power. Just go in understanding that the weight range is narrow and the stones are more about pleasure of use than physical function, so it is a beginner's set rather than a lifelong training tool.
Frequently asked questions
Are the semi-precious stones in contact with the body?
No. Each stone sits inside a sealed silicone case, so only the smooth silicone touches the body. This is good for hygiene, but it also means any properties attributed to particular crystals are decorative rather than physical.
Is this set suitable for a complete beginner?
Yes. With a modest 3 cm diameter and light weights starting at 31g, it is one of the gentler ways to begin pelvic floor exercises. The two cases also let you start light and swap up as your control improves.
What lubricant should I use?
Use a water-based lubricant only. The cases are silicone, and silicone-based lubricants can damage that material over time. Water-based options are safe and easy to rinse away.
How different are the six weights?
Less than the variety of stones suggests. Crystal is the lightest at 31g and Amethyst is 37g, while the remaining four stones all weigh 38g. The progression is really a single small step, so committed trainers may find the range limiting.
Does it need batteries or charging?
No. This is a purely manual pelvic floor trainer with no electronics, so there is nothing to charge and no batteries to keep in the drawer. It is ready whenever you are.