IIR 3ply medical mask, meets European standard: EN 14683:2019 (BFE > 98%) elastic ear hook and central nasal line. 3 layers with intermediate polypropylene melt spraying non-woven fabric filter layer WHO Recommended Specifications: Surgical Mask, Good Breathability, Internal And External Faces Should Be Clearly Identified As Type Ii Or Higher EU MDD Directive 93/42/EEC Category III or equivalent EN 14683 Type II, IR, IIIR