C-4 Protective Mask

The C4 CBRN Protective Mask is the current issued gas mask of the Canadian Armed Forces. The C4 is a negative-pressure, full-face respirator with an ergonomic butyl rubber face piece. With its stretch-fabric mesh head harness and two simple adjustment pull straps, the C4 respirator is easily donned and doffed.
The C-4 Protective Mask was to be replaced starting in 2019 with the AirBoss Low Burden Mask as part of the Joint Chemical Biological Radiological Nuclear General Service Respirator contract.