These photos were taken inside a factory in São Gonçalo, Brazil, in July. These Guy Fawkes masks are made in factories like this all over the world.
In recent years, the Guy Fawkes mask has been among the most popular masks to wear during protests.
On Tuesday, hacktivist group Anonymous plans to hold The Million Mask March, a global protest taking place in cities around the world.
Anonymous members wear the mask as a reference to Alan Moore's V For Vendetta, which features a masked vigilante fighting a totalitarian government while wearing a Guy Fawkes mask.
The march also lines up with Guy Fawkes Day (also called Bonfire Night) on Nov. 5, which commemorates the day Guy Fawkes and a group of English Catholics who tried and failed to blow up British Parliament in 1605.
Because of the film adaptation of V For Vendetta, Time Warner owns the image and profits from sales of the mask.
The masks are one of the top-selling items on Amazon.
Ryan Broderick is a reporter for BuzzFeed News and is based in London.