The Avel MB surgical mask is suitable for surgery and also protects your surroundings from viral infections. The microbial filtration layer is made of delicate organic fibers. Surgical face masks, very soft, non-woven fiberglass fabric, three-layer or four-layer, integrated support, latex-free round elastic according to EN 14683 type IIR. Bacterial filtration efficiency > 99%. Blue BFE = 99.2% @ 3 microns PFE = 99.2% @ 0.1 micron Fluid resistant outer layer White hypoallergenic inner cellulose layer Extra soft - will not lint, tear or shred Free of chemicals, inks and dyes Extra-long aluminum nose piece
