Tone and tease as you Tighten and Tense, to help build up stronger kegel muscles. Slip the silicone balls inside and feel your muscles squeeze around them, ensuring you feel each sweet sensation as the free-roaming balls roll and bounce. "A weekend of firsts." Fifty Shades of Grey Entirely encased in silken silicone, the set features 2 small balls and a long and strong retrieval cord for complete peace of mind during use. Tipping the scales at 70g, the balls are ideally weighted for beginners. As you move, the balls' internal weights jiggle and roam, their sensation increasing in intensity along with the vigour of your activity. 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. Part of the Fifty Shades of Grey Weekend Collection approved by author E L James.