Most people have never heard of Mary Kenner, yet her ideas reshaped modern period care. Her story is a reminder that some of the most important contributions to everyday life come from women who refused to give up, even when the world tried to shut them out. In the 1950s, menstrual products were unreliable and uncomfortable. Kenner saw the problem clearly and created a sanitary belt with a moisture proof pocket that finally offered real protection. It was practical, smart, and far ahead of its t