This University of Delaware case study examines Flex Co., the U.S.’s #1 sustainable period brand, and founder Lauren Schulte Wang’s global expansion strategy (2014-2020). The case addresses period poverty, social stigma, and infrastructure challenges affecting women’s menstrual health globally. It analyzes how cultural perceptions shape menstrual experiences, particularly in developing countries, and explores Flex Co.’s potential to scale its body-positive, life-changing period products worldwide. The study examines marketing strategy effectiveness in the U.S. and considerations for cultural adaptation in international markets, linking to SDGs on health, gender equality, and responsible consumption.