... Soft, Comfortable, Odorless, Breathable4) No stimulus to human skin5) Filter bacteria and dust6) Used for clinical and workshopSpecification:1) Material ... ply 20gsm PP + 25gsm PP 3-ply 20gsm PP + 20gsm filter paper+ 25gsm PP2) Size: 17.5x9.5cm, 16x9cm (for adult ... enterprise, the chemical enterprise, the painting workshop, the leather industry, and the environmental sanitation unit. we also can pack it ...