I know I should do an exhaustive study on this sort of thing, but that would require an awful lot of field testing that I'm not up for at the moment, ha. Apparently these undies can be washed 200-250 times and still do the trick. Could be a money and planet saver if they work well....
http://www.weareverincontinence.com/
http://www.weareverincontinence.com/