Main material: It is manufactured with high-end nanofibrous film as the core filter layer. And a four-layer structure of the mask is formed by the nanofibrous film with non-woven fabric and hot air non-woven fabric, which is lighter and thinner than tranditional CPA masks. Biosis Healing made lighter masks, good balance between high adaptation and comfortable.
Filtration efficiency: the mask with at least 99% filtration efficiency effective against certain non-oil based particles. It can effectively separate suspended particles and bacteria.