We flew in the beginning in FFP3 respirators, but it's very warm/hot, not comfortable at all for longer flights and you basically cannot even drink water - otherwise using FFP3 doesn't make sense at all. So we started to fly in usual masks and our medical uniform, which we put to the washer after each flight. We also stopped doing any service for passengers during the flight (like opening bottle of wine, serving food and etc). All passengers are required to have masks as well, plus after each flight we fully desinfect the plane.