In celebration of Menstrual Hygiene Day, Procter & Gamble’s leading feminine protection brand Tampax, is collaborating with 20 social influencers to donate one million tampons to women’s charities across the U.S. over the next 30 days.

Menstrual Hygiene Day takes place on May 28 and is a global initiative aimed at raising awareness around the challenges women and girls face during their menstrual cycles. The initiative also strives to educate on the role feminine hygiene plays in allowing women and girls to reach their full potential.

In the U.S. alone, one in three women are either living in poverty or on the brink of it, which can make it challenging to secure feminine hygiene products on a monthly basis. Without the proper protection, a woman’s monthly cycle can compromise her dignity and result in her missing work, skipping school, or sacrificing important things in her life. Underserved women sometimes have to make a choice between food and period protection, and Tampax wants to change that.

“It’s widely recognized that women and girls in developing countries often lack access to menstrual hygiene products, but what most Americans don’t realize is that this is true in our own backyard,” says Amanda Hill, marketing director, North America Feminine Care at Procter & Gamble. “We believe that every woman and girl deserves access to feminine care products, and this donation is part of our continued efforts in supporting those in need.”

With a donation of one million tampons in 30 days, Tampax aims to encourage women to become catalysts for change in their own communities by engaging in a national dialogue around the importance of access to feminine products. Individuals all over the country can get involved by using #PowerOverPeriods and share what actions they are taking to help break the period stigma and help those in need.

“The women behind Tampax share my vision in providing equitable access to menstrual hygiene, especially to those in need, and changing the narrative around menstruation,” says Nadya Okamoto, founder of the 501(c)(3) non-profit organization PERIOD. “I’m inspired by what Tampax is doing to shine a light on this issue and thankful that we can make access to period products a reality for even more people with periods.”