UNSTOPPABLE. PERIOD.
We transform menstrual health into a catalyst for equality.
By building the systems that make menstrual health work, we ensure every girl and woman can move, participate, and lead with confidence, every day of her cycle.
THIS IS ABOUT POWER
Half of humanity menstruates.
But for millions, it still means stopping.
Missing school. Sitting out. Holding back.
We don’t accept that.
Because a period should never decide what you can do,
where you can go, or who you can become.
We are here for the girls who show up anyway.
The ones who push forward.
The ones who refuse to sit on the sidelines.
We build what they need,
products, knowledge, systems,
so nothing gets in their way.
This is bigger than periods.
This is about power.
Be Girl.
Unstoppable. Period.
OUR APPROACH
We deliver change through three integrated solutions.
Performance Products
High-quality, sustainable period care designed for comfort and reliability in real-life conditions. Explore products.
Body Literacy & Education
Scalable, youth-centered education systems and national curricula that build knowledge and agency.
Data-Driven Insights
Turning evidence into action to shape policy, unlock markets, and drive solutions at scale. Discover more.
OUR IMPACT
1 million+
sustainable menstrual
products distributed
500,000+
young people reached with
menstrual health education
1,000+
teachers, health workers
and youth leaders trained
60 partnerships with institutional clients, including UNFPA, World Bank, and WaterAid.
5 impact studies in collaboration with UNFPA, FDC, World Bank and Global Fund
2 national menstrual health curricula in Mozambique and Angola (and soon, Côte d’Ivoire)
ABOUT US
Be Girl was founded in 2014 by industrial designer Diana Sierra, grounded in a simple belief: a period should never be a barrier to participation in life.
What began with a single product has evolved into a global, women-led social enterprise building the systems that make menstrual health work.
We go beyond products, partnering with private sector, governments, institutions, and communities to expand access, shift norms, and drive lasting change at scale.
Learn how this journey is transforming menstrual health from an overlooked issue into a global priority in this case study by Grand Challenges Canada.
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“Since receiving my PeriodPanties, I feel safe and confident to attend school without leakages or embarrassment.”
- Celina, 13 years old Mozambique
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“This training helped me understand my body in ways I never had before. That knowledge makes me feel more confident.”
- Laura, 14 years old Mozambique
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“If all young people, and women and men, had the chance to learn what I learned today, the world would be a much better place.”
- Eduardo Elias, 16 years old Mozambique
OUR PARTNERS
Working with Be Girl has been such an opportunity... We have all learned so much.
- Population Services International
