![File:Gas mask, WWI, 111-SC-716 - Chemical Warfare Service - Gas masks - NARA - 55162765 (cropped).jpg - Wikimedia Commons File:Gas mask, WWI, 111-SC-716 - Chemical Warfare Service - Gas masks - NARA - 55162765 (cropped).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/a/a0/Gas_mask%2C_WWI%2C_111-SC-716_-_Chemical_Warfare_Service_-_Gas_masks_-_NARA_-_55162765_%28cropped%29.jpg)
File:Gas mask, WWI, 111-SC-716 - Chemical Warfare Service - Gas masks - NARA - 55162765 (cropped).jpg - Wikimedia Commons
![Permeable gear with the M3-IXA1-IVA1 Diaphragm gas mask. Permeable gear was used as early as WW1 and remained standard into the 1950s. My specific setup uses the second pattern “special” HBT uniform Permeable gear with the M3-IXA1-IVA1 Diaphragm gas mask. Permeable gear was used as early as WW1 and remained standard into the 1950s. My specific setup uses the second pattern “special” HBT uniform](https://preview.redd.it/8me49t6qyyx41.jpg?auto=webp&s=ce57fda07c4c8b0d65ea50c5eb2479cb66173b44)
Permeable gear with the M3-IXA1-IVA1 Diaphragm gas mask. Permeable gear was used as early as WW1 and remained standard into the 1950s. My specific setup uses the second pattern “special” HBT uniform
WW1 Photos & Info. - U.S. soldier wearing a gas-mask posing for a photograph with an M1917 Revolver and a bolo knife, 1918. . The M1917 Revolver was a U.S. revolver produced
Echoing history, Army Reserve Soldiers play baseball in gas masks > U.S. Army Reserve > News-Display
![Original U.S. WWI M1917 SBR Gas Mask with Carry Bag, Instructions, and – International Military Antiques Original U.S. WWI M1917 SBR Gas Mask with Carry Bag, Instructions, and – International Military Antiques](https://www.ima-usa.com/cdn/shop/products/ONSV3608__08.jpg?v=1617307373)