*1 Patent acquired
*2 “Medical grade” refers to a mask grade meeting the N95 standard set by the National Institute for Occupational Safety and Health (NIOSH). This standard is cited in the Guideline on Maintenance of Medical Equipment and Materials in Medical Systems for New Influenza and other illnesses,” issued by the Ministry of Health, Labour and Welfare, as one of effective mask standards. The results of PFE tests by the Kaken Test Center, equivalent to NIOSH, demonstrate that the filtration performance of YAMASHIN filter masks is comparable to that of N95 masks.