Use by the Russian Army of protective means against German chemical weapon applied during the First World War.

The first can be considered the simplest mask gauze or cotton-gauze impregnated with sodium hyposufite, which pressed to his face and breathed through it (i. e. <> gas mask, based on the principle of chemical neutralization of toxic substances). The most successful type of domestic wet gas mask is considered to be a gas mask constructed. by N. T.Prokofev with hermetically inserted glasses of plain glass. Using by Germany all new toxic substances required continuous improvement of gas masks and the use of not chemical, but physical principle of neutralization, based on the non-specific binding molecules toxic agent. Creation in Russia really acting dry gas mask associated with the name of the outstanding scientist. Zelinsky, first proposed, to use as activated carbon adsorbent. Engineer Petrograd factory < E.L.Kummant developed rubber helmet with goggles, do not require special mounting head and reliably protects both respiratory tract and eyes from exposure to toxic substances. The principle of the device mask Zelinsky-Kummant - canister with activated charcoal (and various additives) and a rubber facemask-is the basis of all modern designs masks.