Disposable respirator masks also have received increased attention because of late with the spread of the H1N1 influenza virus, even though they've been used for different functions such as occupational safety. N95 describes a National Institute for Occupational Safety and Health (NIOSH) evaluation that's delegated to masks that satisfy a given minimum standard for chemical transmission.

The N95 respirator mask is designed to filter up to 95 percent of airborne particles 0.3 microns or larger that can otherwise immediately enter the mouth and nose of the wearer. These masks may also be worn by those that have a infectious disease to prevent allergens from leaving the mouth and nose of the wearer and also placing others in danger. While these masks don't protect against particle transmission using 100 percent accuracy, they may be effective in preventing the spread of disease.

N95 masks can be bought together with our without a valve to ease breathing. Optimal protection is accomplished while the respirator mask fits snugly to the surface, covering the nose and mouth area without even leaving open spaces across the border.

Respirator masks should be fitted properly to the wearer and not be blocked by facial jewelry or hair. A badly fitted respirator mask has higher capacity to permit air pollutants to enter through openings along the borders of the mask, supplying lower degrees of protection from the inhalation or spread of contaminants in relation to a nicely fitted one.

Respirator masks are frequently used for occupational safety, and are especially common in industrial and healthcare facilities. Masks used at the office has to be NIOSH-approved, which means that they meet minimal criteria put forth by the National Institute for Occupational Safety and Health.

The intended purpose ought to be kept in mind when buying respirator masks. Various kinds are intended for particular functions and provide varying degrees of protection. Another consideration is if the mask includes latex, an allergen for some individuals. Latex free N95 respirator masks can be found, and will be marked as such.