Masks and gasoline filters are utilized to protect the body from harmful chemical and biological effects. Many chemicals such as chlorine, hydrogen cyanide, phosgene, mustard agents and many others were utilized during World War I. This caused casualties among allied forces and created the need for protective masks.

Since that time gas masks have emerged and protected by all known chemical and biological forms. Gas masks utilize various techniques to protect users. But common elements such as the face, hood, eyepieces and filters are in almost all masks.

You can explore this link to find perfect masks and filter for use. 

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The most basic mask uses filtering techniques. Pollutants in general have particles larger than oxygen and by using fine mesh this can be avoided. The only drawback is the air supply can also be limited in this process. Other processes utilize quality absorbing certain substances like activated charcoal to restrain dangerous agents. Such masks have limited use, because they can only absorb a few substances. The mask is presently employing a chemical neutralization method. This Gas Mask Military contains a compound filter which neutralizes harmful chemicals in the atmosphere. A number of them have tubes for drinking water, communication systems, and winter gear to stop fog during cold weather states.

This mask provides adequate protection only for the facial skin and internal organs.

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