N95 and FFP2 are similar kinds of respiratory masks. These masks supposedly protect both the wearer and people around them. The World Health Organisation cites studies which show the filtration systems of FFP2 and N95 masks are 94 and 95 per cent effective respectively. Their enhanced effectiveness has led to countries such as Austria and Germany making them a requirement on public transport. FFP3 masks are the most effective, followed by FFP2/N95, then surgical masks and, finally, cloth masks.