Home Design Performance Material The GENESIS II knee is unique among implants appropriate for women. Not only does it conform to the shapes and dimensions of female anatomy, but the wear-reducing material from which its thighbone portion is made is the lightest weight implant metal on the market. For active women, the GENESIS II knee is the next step forward. For more information about knee repacement surgery, visitwww.MyLifeInAction.com. *Trademark of Smith & Nephew. Reg. US Pat. & TM Off.