Gas mask with filter canister worn at demonstrations in Ferguson, Missouri | National Museum of African American History and Culture
File:Germany gas mask, Model 1917 - National World War I Museum - Kansas City, MO - DSC07567.JPG - Wikimedia Commons
![MSA Model "S" with All-Vision facepiece and universal windowcator canister, coming from Charleston, West Virginia : r/gasmasks MSA Model "S" with All-Vision facepiece and universal windowcator canister, coming from Charleston, West Virginia : r/gasmasks](https://i.redd.it/io3l59nn27661.jpg)