Five layer Civil KN95 mask, filters 95% of small particles. Mask can be shaped to nose for proper fit. CE (European Union) mask safety certification. FDA approved manufacture. First layer: No-woven fabric 45-50g Second layer: Hot air cotton 45-50g Third layer: melt-blown fabric 25g Fourth layer: melt-blown fabric 40-50g Fifth layer: No-woven fabric 25-305g.