Luna Balls are designed to help women strengthen vaginal muscles and pelvic floor, which may weaken if not exercised on a regular basis, after childbirth or as part of the aging process. The Luna system weighted balls are designed with smaller balls inside so subtle kinetic vibration is created with movement, creating a pleasurable sensation. The balls can be inserted individually or a silicone girdle is provided so 2 balls can be worn, creating more resistance. Luna System includes, 2-28gram balls, 2-37gram balls, silicone girdle, elegant gift box, detailed user manual, satin pouch and 1-year warranty.