A gas mask is a piece of protective equipment worn over the face to reduce the effects of dangerous gases or toxic chemicals. It is a vital piece of personal protection gear for anyone who works in hazardous environments, such as emergency services personnel, first responders, military and police.
The gas mask is one of the most essential pieces of survival gear for the average person in case of a disaster, and it’s available to the general public now. This model of the gas mask costs $220 and features a mesh head harness that provides a comfortable fit, a factory-installed speech diaphragm that allows for clear communication and a drinking port that can be used to drink liquids in CBRN situations.
This mask is made from bromobutyl rubber that has been extensively tested in the most harsh conditions and is certified by the manufacturer to provide protection against chemical warfare agents, toxic industrial chemicals and biological agents. It has an interchangeable visor and can be fitted with NATO-standard filter canisters to protect against different hazards. The breathable head harness and two points of adjustment allow for quick donning and doffing. The mask is compatible with any NATO 40 mm filters and has a filter port on either the right or left side to make it easier to aim weapon sights.
The influence of the aerosol particle size and type, gas flow and pressure differential on filtration efficiency is nonlinear and nonconstant, while the fitness plays an important role in the protective performance of masks. Therefore, future research should focus on improving the filtration efficiency and respiratory resistance of masks.