Home Design Performance Material Everybody knows men and women have slight differences in the shape of their knees. The GENESIS* II knee was designed using advanced engineering concepts to accommodate these differences. Thin Because the end of a woman's thighbone (femur) is smaller than a man's, the GENESIS II knee was designed to be thinner in the sizes appropriate for women. Narrow Even if a man and a woman were the same height, the shape of the woman's knee would be narrower than the man's. The GENESIS II knee achieves optimal side-to-side fit for women. Natural The difference in the width of male and female hips impacts the angle at which your knee joint comes together. In order for your muscles to extend and flex your leg in a natural, pain-free motion during physical activity, your implant must accommodate this angle. The GENESIS II knee does. For more information about knee repacement surgery, visit www.MyLifeInAction.com. *Trademark of Smith Nephew. Reg. US Pat. TM Off.