Intended to be worn on its own or as an insulating layer beneath the M-1943 Field Jacket and over the standard wool flannel shirt and wool sweater, it featured a pleated back, adjustable waist band, fly-front buttons, bellows chest pockets, slash side pockets, and shoulder straps.
Simply designed and modeled after a civilian windbreaker made by John Rissman & Sons of Chicago, it was a short, button-front weatherproof jacket with a tight fitting waist and two flapped and button-through front pockets.
During autumn 1943, the Army Air Corps' prototype jacket was sent to Chief Quartermaster of the European Theater of Operations for review and possible adoption by ETO commanding general, Dwight D. Eisenhower.
According to Carlo D'Este, citing an eyewitness account by James Parton, while visiting the VII Bomber Command in England in 1942, Eisenhower openly admired a uniform jacket worn by Major General Ira C. Eaker.
Eaker's jacket had been specially made by a London tailor, modeled after the standard dress of the British armed forces.
It featured notched lapels, a closable "storm collar", snag-free fly front buttons and flapped, bellows breast pockets, shoulder straps for gear retention, and roomy sleeves to accommodate insulating layers.
[8] Following the Guadalcanal Campaign, the 1st Marine Division under Major General Alexander Vandegrift were posted to the cooler climate of Melbourne, Australia.