One requirement is that the current M50 gas mask, in use by all services, not be affected by the JGPD-HME decontaminant under consideration.

The Marines are updating their scary-looking M40 gas masks with a newer, more comfortable and streamlined mask that borrows from the special operations world where vision, low-drag ergonomics and ...

MEDITERRANEAN SEA (April 29, 2011) Marines assigned to the 22nd Expeditionary Unit (22nd MEU), run while wearing M50 gas masks aboard the amphibious assault ship USS Bataan (LHD 5). 22nd-MEU is ...