KN95 facemasks are an excellent alternative to N95 facemasks as they conform to a similar standard. This is a high quality FFP2 self-priming filter type particle respirator and MEIDE is a trusted manufacturer. Certified by CE. Manufacture date: 4/2020. Conforms to the higher GB2626-2019 standard required by Chinese manufacturers as of April 2020. 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.