Respirators with FFP certification
For a mouth covering to be designated and certified as a respirator, medical standards must be met. With the advent of Corona, there is always talk of FFP2 respirators. First, FFP stands for "particle-filtering half masks". Incidentally, the term comes from English and stands for "filtering face piece". FFP-certified respirators are available in three levels: FFP1, FFP2 and FFP3. Depending on the level, the total leakage and the protection factor change. FFP1 masks, for example, are used in workplaces with high dust exposure. They filter at least 80% of the particles up to a size of 0.6 micrometres in the air we breathe. However, viruses are so small that they can slip through the fabric. FFP2 masks are so finely meshed that they also block viruses, including Covid-19 and noroviruses. The total leakage must not exceed 11%. Aerosols and hazardous dusts are also stopped. FFP3 masks offer the highest protection, but they fit so tightly against the skin that they are very difficult to wear for long periods. In principle, all particle-filtering half masks are intended for single use.