KN95 FACE MASKS come in a sterile package and are sold 10 mask in a box
KN95 Face Masks are respiratory protection devises that are regulated by Centers for Disease Control and Prevention (CDC) National Institute for Occupational Safety and Health (NIOSH) and Occupational Safety and Health Administration (OSHA). These respirator masks provide a high level of personal protective that are used to protect the wearer from airborne particles and from liquid contaminating the face and respiratory system. The standards for KN95 and N95 are that they block at least 95% of all partials that are 0.3 micron and larger in size.
Executive Standard GB 2626-2006