This mask was of fragile construction, required excess training to use effectively and largely immobilized men during a gas attack as they were concerned about their mask coming loose. As it evolved, this mask used several filter types including filtering cartridges filled with agglomerated coal and glycerin water.

The ARS well covered the face thanks to adjustable elastic straps and offers a good protection to eyes and breathing system. Breathing is made safe through air purifying cartridges for an efficient protection. This new mask called ARS mask (special respiratory device) or MCG (chemical warfare mask) was at that time the best protective unit against gases the Allied soldiers had to face. Though, its usage only started in January 1918. In August 1916, a new gas mask version inspired by the German WW1 gas mask units was engineered, and produced in January 1917. They were usually tied around the neck with an attached cloth lace or string. The hood-like design allowed for the mask to be slipped over the heads of the patients that were lying prone on cots or beds and prevent the mask from sliding off.

They were made up of the constituents of the “Model 17 Ledermasken” that is, the lenses with reinforcing “spiders” and the later war 17 “third model” filter canister. Early World War 1 gas mask designed for use for hospital patients situated near the front lines where gas attacks were imminent.

Gas mask ww1 drawing