Silver Ion Mask / (1 Pcs/Package) Price: 1.80 Euro Silver Ion mask is a reusable and washable mask that provides reliable respiratory protection of at least 99% filtration efficiency against microbes and airborne particles. This mask is constructed with 5 different filter layers; each layer serves a specific function and ensures that the maskâ??s performance can be retained after washing. These functions include directly inactivating microorganisms through antimicrobial materials, and electrostatically absorbing microorganisms and particles. ADVANCED 5-LAYER SHIELD Please ask for price for high quantities.