... CE certificate SGS tested, guarantted by PICC Fire Protection Face Cover Face Mask Purify Air 30M Main Technical Specification:1. Comply ... good sealing property, suitable for all kinds of adult faces.2. Object of protection: Carbon monoxide (CO),hydrocyanic acid(HCN), ... resistance<300Pa. Operation:1.Open the cover, take out the vacuumized packing bag.2.Tear the vacuumized packing bags immediately, ...