GyneFlex is the first and only resistance exerciser designed by a Board Certified Gynecologist to strengthen vaginal muscles. GyneFlex is FDA cleared for treating urinary incontinence. It is easy to use, comfortable, and anatomically correct. Recommended by Maternal Fitness, "What Your Mother Never Told You About Sex", and "The Orgasmic Diet". ***LIGHT FLEX STRENGTH*** Should be purchased by women who have had three or more children, are post-menopausal or who have had bladder repair surgery, and/or suffer from moderate-to-severe incontinence.