Fun Factory Smartballs Duo - 白色/淡紫丁香色

The weighted balls inside actually shift when I move, so my muscles are working without me having to think about it. The tapered shape made insertion way easier than I expected for a first-timer.

The weighted inner balls actually move when I walk around doing chores, which I didn't expect to notice so much. Tapered shape made insertion easy from day one, no fiddling. Only a couple weeks in and I can already feel my muscles engaging more.

I've been using these for about three weeks and can already feel a difference in my pelvic floor strength. The weighted balls inside actually shift when I move, so it's a real workout rather than just sitting there, and the tapered shape made them easy to insert from day one.