Balaclavas and bandanas displaying the lower jaw of a skull over the wearer’s mouth, often dubbed ‘skull masks’, are the unofficial uniform of the modern far-right accelerationism movement. Their use in extremist circles was popularized by white supremacist groups associated with the Iron March Network, such as Atomwaffen Division, who featured it extensively in their propaganda.

In memes, they can be added to characters as an endorsement of far-right accelerationism, or to signify one’s status as an extremist. Despite their widespread use by white supremacist groups, skull masks are sometimes used in non-hateful video games and as part of Halloween costumes.