Tangwei's TW-1 FFP2 protective mask 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 traditional FFP2 masks. The mask with at least 94% filtration efficiency effective against certain non-oil based particles like dust, pollen, gases, odors, and it can effectively separate PM2.5 fine particles and bacteria.Unique design with heightened nose piece and adjustable clip.Good balance between high efficiency of filtration and comfortable.