Respiratory protective devices – Full face masks connected with fire fighters head protection for use as a part of a respiratory protective device – Requirements and tests
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 11/01/2014

Respiratory protective devices – Full face masks connected with fire fighters head protection for use as a part of a respiratory protective device
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 02/01/2006