If you’re participating in the Women’s Marches next weekend, there’s a good chance you’re already thinking about your outfit—and there’s nothing wrong with that. Just a few days ago, the #TimesUp blackout on the Golden Globes red carpet proved just how impactful clothing can be. You might see women marching in head-to-toe black, though the color most associated with the Women’s March is hot pink, thanks in part to the pussy hat. But you can expect to see a lot of bold stripes in the crowds, too, namely Kule’s new 1973 T-shirts created in partnership with Prinkshop and the National Institute for Reproductive Health. The tees are available starting today, and 30 percent of proceeds will go to the NIRH to help protect reproductive freedom at the state and local level.

Why 1973? Roe v. Wade was passed in January of that year—almost 45 years ago exactly—legalizing abortion in the United States. While many people will immediately know why it’s stamped across your shirt, it will spark a conversation if they don’t. “Nineteen seventy-three already symbolizes something really powerful for a lot of people, but this is a way to get more people involved,” Andrea Miller, the president of the NIRH, tells FT. “We’re looking back to look forward, and seeing what we can learn from these important moments [in the past] that transformed our society and women’s experiences.”

For the retro 1973 graphic, Nikki Kule tapped Prinkshop’s Pamela Bell, who sells her own silk-screened tees with messages like “Eroticize Equality” and “You See a Girl, I See the Future” on her website. Her business skyrocketed in 2017 as women became increasingly vocal about the Trump administration. “For us, what better way to show that you care about something than wearing it on your chest?” she says. “When I first started my company, people kept telling me that no one wears graphic T-shirts and that they wouldn’t sell. Now, companies can’t even keep up with the demand for their graphic tees. It’s not just about a sale—it’s the fact that you’re wearing something that projects a message. It’s a different kind of status symbol.”