【明報專訊】THE Consumer Council (消委會) tested 30 brands of face masks for their particle filtration efficiency (PFE) rate. A Vietnam brand named Perfetta has an average PFE of only 86%, failing to meet ASTM level two as claimed.
【明報專訊】THE Consumer Council (消委會) tested 30 brands of face masks for their particle filtration efficiency (PFE) rate. A Vietnam brand named Perfetta has an average PFE of only 86%, failing to meet ASTM level two as claimed.