These fantastic silicone vaginal balls contain free-moving balls inside and offer amazing stimulation throughout the day while simultaneously working to tighten and strengthen your vagina. Simply insert the two balls, leaving the silicone tail outside. The vaginal balls include smaller heavy balls within the silicone cases, and with every movement you make, they will move, causing a sensation of impact. Not only will you feel amazing, but your muscles will contract around the balls, providing you with a stimulating vaginal workout like no other.