Used with an approved air source, M-400 Series helmets provide respiratory (OSHA APF=1000) and limited head (ANSI Z89.1-2003 Type 1 Class G) and eye (ANSI Z87.1-2010) protection. The M-405 assembly includes a standard visor and standard shroud. The M-405 assembly includes a M-925 Visor, M-444 Inner Collar, and M-445 Outer Shroud. The M-925 visor is made of polycarbonate. The M-445 shroud is appropriate for general purpose use.