KN95 respirators are an excellent alternative to N95 respirators as they conform to a similar standard. This mask is a City of Angels PPE customer favorite and SkyScreen is a trusted manufacturer. The SkyScreen KN95 Respirator Hypoallergenic Masks come sealed 2 per bag or box of 20 and are FDA registered. Unique ‘duckbill’ design that medical professionals are used to with comfortable elastic earloops that eliminate pressure to the ears. Inner layer is made of soft facial tissue, no dye, gentle to the skin. These masks are suitable for health workers, cleaners, builders, construction workers, dental uses, nail technicians and people with allergies. While these masks are designed to be used once and then discarded, they have a ‘life’ of about 9 hours, so with proper care you can extend for multiple uses. We recommend storing them in a paper bag when not in use.