Add a little fun to pelvic workouts with these luxurious color-changing Kegel balls. Wrapped in silken black silicone, not only do these jiggle balls contain free-roaming weights for discreet arousal, they also change color with the heat of your body. "I flush from the constant movement of the silver balls. They weigh down inside me, massaging me internally and make me needy, needy for sex. Oh, the sensation is exquisite." - Anastasia Steele Tipping the scales at 3. 1oz and entirely encased in silken silicone, this set features two balls, which change color from black to purple as your body heats up. As you move, the internal weights jiggle about. As your muscles clench around them they provide a light internal workout, which can improve vaginal tightness and aid orgasmic strength. Slather your jiggle balls generously with water-based lubricant before use, to ensure smooth insertion and a comfortable experience. The jiggle balls come with a Fifty Shades of Grey storage bag, making them an ideal erotic gift for fans of the books. Part of the Fifty Shades of Grey Official Pleasure Collection approved by author E L James.