"Men go to the bathroom and there's toilet paper, paper towels, soap, water - everything they need's in the bathroom. Why haven't we long ago questioned why everything *we* need isn't in the bathroom?"
-— Claire Cox, Georgia STOMP
"Period poverty" refers to a lack of access to menstruation management products and safe, hygienic spaces in which to use them, exacerbated by social and cultural stigma surrounding menstruation.
Menstrual equity, then, is the process of restoring those rights.
To put things in perspective...
Items states have decided to make tax-exempt instead of period products:
Texas: cowboy boots
Illinois: barbecue sunflower seeds
Wisconsin: gun club memberships
Louisiana: Mardi Gras beads
Georgia: candy and soda
The U.S.: Super Bowl tickets