Fun Factory smartballs are inserted into the vagina and can be worn for several hours. Every move you make cause the metal balls in the smartballs interior to vibrate. Hence the vaginal muscles are stimulated, massage and exercised. The smartballs even provide a targeted workout of the pelvic floor, which leads to more fun with your partner. They support regeneration gymnastics and can prevent incontinence. Smartballs are made of sales, nonhazardous materials, which are also used in the manufacturing of medical products. They are extremely durable and easy to clean. The unique design and velvety smooth surface are a delight to the eye. The structure and the slightly elliptic form noticeably enhances the thrill of the intimate massage.