... Color:Blue,Green,White Certification:European CE 3-ply nonwoven facial mask:non woven face mask:2-ply or 3-ply ... products filter the air particulate matter.2. Flame-retardant performance: care products prevent itself being lit, having flame burning and smoldering ... 5. Can reach the effect of preventing dust, no particles ultrasonic sealing edge;UsageUsed in medical, food hygiene, electronics, dust-free ...