The LAG (Light Anti gas) MK II was a British gas mask designed during the Second World War, first issued in 1943. The LAG was designed to remove the cumbersome hose and filter of the earlier British army gas masks, using a 60mm threaded filter attaching directly to the left cheek. The LAG was first used operationally by paratroopers and other assault units on the 5-6th of June 1944 with the Allied invasion of Normandy. This mask not only weighed less than the earlier models, but also enabled easier movement because of the elimination of the large filter and hose.