I found this image and others like it on the CF site but never seen this type of helmet before. What is it? A gas mask?
http://www.armyimages.forces.gc.ca/scripts/portweb.dll?query&field=Filename&op=Matches&value=ExRaging25D.jpg&catalog=cls_images&template=eng_detail_ie_1
http://www.armyimages.forces.gc.ca/scripts/portweb.dll?query&field=Filename&op=Matches&value=ExRaging25D.jpg&catalog=cls_images&template=eng_detail_ie_1