N95 respirators and surgical masks (face masks) are examples of personal protective equipment that are used to protect the wearer from airborne particles and from liquid contaminating the face. Centers for Disease Control and Prevention (CDC) National Institute for Occupational Safety and Health (NIOSH) and Occupational Safety and Health Administration (OSHA) also regulate N95 respirators.
The N-95 masks are made to standards prescribed by the US National Institute for Occupational Safety and Health (NIOSH). They conform to the same filtration norms as the KN-95 mask wherein a minimum of 95% of tiny particles should be trapped while passing through the mask. However it is designed in such a way that it is easier to breathe through them. This is because prescribed norms dictate a drop in pressure while inhalation as well as exhalation. N-95 masks are manufactured with multiple layers of polypropylene polymer plastic. Headbands are used in place of ear loops to provide a snug fit. They are meant for front line Covid 19 warriors and should be used once and discarded.Re-use should be avoided as sanitizing or washing masks reduces their capacity to filter out particles thereby making them ineffective for protection against covid-19 infection.
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