Movement Ink, a screen printer based in California, is suing the U.S. Postal Service for allegedly seizing shipments of Black Lives Matter masks, NBC News reports. The masks, which had slogans like “Stop killing Black people” and “Defund police,” were bought by the Movement for Black Lives (M4BL) and were intended to be shipped to Washington, D.C., St. Louis, New York City and Minneapolis following George Floyd’s death in 2020.