Military Pullover

In Britain, in addition to the army and marines wear sweaters, the navy and air force also widely wear them, and the color is changed to the blue of the air force uniform or the blue and black of the navy uniform according to local conditions. After the 1980s, Western militaries adopted the British army uniform sweater, and also followed the British shirt collar outward wearing style.
https://www.jihuaint.com/products/military-pullover/