FDA registered (D381391) face mask with 4-Ply construction and an inner layer of 50g melt-blown polypropylene and a layer of cotton. 95% filtration for particles larger or equal to 0.3 microns. Adjustable nose bridge and elastic ear loops. Complies with China Standard GB2626-2006 and European Standard EN149:2001 A1:2009. Not intended for medical use, for personal protection only. Must be ordered in quantities of 100.