For centuries women have used Ben Wa or Geisha balls to stimulate and exercise their internal muscles, toning up their pelvic floors.
These duo balls work in exactly the same way - a small, heavy ball inside wobbles and moves the larger outer ball around inside you, strengthening and toning your pelvic muscles.
Lightly lubricate the balls and then simply insert them gently and let them roll inside you, toning your pelvic floor muscles - especially useful if you've just had a baby and are looking to get some internal definition.
Sarah's Secret Love Balls. The fun never stops with thsee Oscillating Duo Balls. The balls have internal weights so the more you move, the more they move. Unisex. They come with a strong and durable pull cord for when you just can't take it anymore.