You see it as soon as you land at the airport: posters telling women to keep their headscarves on. They're everywhere in Iran; in malls, restaurants, billboards above main highways, and even rest stops in between cities. The hijab remains the official law in Iran.
But these days, all around the country, many women are going about their business hair uncovered. It's a vivid reminder of the public uproar and anti-government protests that erupted after Mahsa Amini, a 22-year-old Kurdish woman, was killed in police custody in September. She was allegedly arrested for improper wear of her headscarf.
The government brutally cracked down on those protests, killing hundreds of people and jailing thousands, according to rights groups.
What began as anger at the hijab law grew into a bigger movement as Iranians said they were fed up with the regime's corruption, economic mismanagement and oppression of its citizens. Now, a visible minority of women in Iran are refusing to wear headscarves, in defiant protest against the government and all of its policies.
In a north Tehran neighborhood, a 63-year-old woman and her daughter said they both decided to stop wearing a headscarf after Amini died. Like many other women who spoke to NPR, they asked not to be identified, fearing government retribution.
The mother said she did it in solidarity with the mothers of the many young protesters who were killed standing up to the regime.
"The only thing that I can actually do at this age is to not have a scarf," she said. "To have the scarf or to not have the scarf, for me, is not very important. I'm not young to show off my hair, but I'm not wearing it to show that my views are against the government's views."