John Spencer on Twitter: "If anyone asked me, I would add every M40 Gas mask (older version of what we used in the US Army) in existence to the #Ukraine️ list of
M40 field protective mask - Wikiwand
Second Skin Liner for the M40/M42 Gas Mask [Genuine Issue]
Monkey Depot - Bag: DamToys Mens M40 Gas Mask Hood
LARGE New Military M45 Land Warrior Gas Mask M40 M50 Air Crew Helmet Ranger LBT | eBay
US Military M40 Gas Mask size MEDIUM with Bag 40mm Filter c2a1 Clear Lens Cover - Centex Tactical Gear