Nose, mouth, chin zone: PROLEN®Siltex antibacterial fibres containing silver ions can filter small particles from air Cheek zone: knitted mesh allows for air circulation Soft, lightweight and breathable, very comfortable to wear and ideal for people with skin sensitive allergies Re-usable: PROLEN®Siltex retains its antibacterial properties for 20 washes. Individually bagged. Hand wash and air dry only Size: 22 x 10 cm PROLEN®Siltex is a polypropylene yarn treated with a permanent antibacterial additive, based on silver ions. Tested and certified on Klebsiella Pneumoniae, Staphyloccucus Aureus and Escherichia Coli RESULT Essential Hygiene products can be used in conjunction with PPE by healthcare workers but RESULT makes no assurances that they can prevent the transmission or infection of disease or viruses. Non-medical