0.1um micron for (PFE) 95%(BFE) 99% The 3D design structure provides better wearing, and with foam nose cover for excellent fitness. Uses a low-allergenic filter layer without latex. 1.Size: for adult 2.Material: Non-woven, melt-blown, P.P. spun bond. 3.Total layers: 5 layers 4.Color: White
