Cracking the Science of Undies
From ABC Online

By tweaking both fabric technology and garment design, scientists with a passion for creating better underwear have made at least four great strides over the past decade. First, they've recruited your underwear in the fight against bodily wetness and odour. Second, they've found some ingenious ways to make underwear fit and feel much better on the body. Third, they've discovered new ways to make underwear behave itself and stay put all day. Finally, they are implanting technological devices into your undergarments, so your bra or briefs can actually monitor your body's activities and take steps to protect you when your undies sense something is wrong!